Answer:
x = 12
m∠UTS = 87
m∠TSR = 143
Step-by-step explanation:
We know that the angles 56, (3 + 7x), and UST, add up to 180, and that UST and (12x - 1) also add up to 180
Therefore we can say UST = 180 - (12x - 1)
and that:
56 + 3 + 7x + (180 - (12x - 1)) = 180
59 + 7x + 180 - 12x + 1 = 180 (combine like terms and distribute negative)
240 - 5x = 180 (subtract 240 from both sides)
-5x = -60 (divide both sides by -5)
x = 12
Therefore,
m∠UTS = 3 + 7(12) = 87
and
m∠TSR = 12(12) - 1 = 143
What graph represents the function? G(x)={x if x < or equal to 2 -3 if x >2
The value of x for the function x > 2 is x ≤ -1. This is represented by the following graph.
What is a graph?A graph is a format similar to a set of elements in different mathematics, more categorically graph theory, in which some pairs of objects are conceptually "connected". Elements are represented by mathematical abstractions called vertices (sometimes called nodes or points), and each pair of allied vertices is called an edge (also called a link or line). A graph is usually characterized as a collection of points or circles defining vertices and lines or curves representing edges. One of the details studied in discrete mathematics is graphs.
The given function is:
G(x)={x if x < or equal to 2 -3 if x >2
Here, the value of x for x > 2 is x ≤ -1. This is represented by the following graph.
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The drama club is selling tickets to their play to raise money for the show's expenses.
Each student ticket sells for $4 and each adult ticket sells for $8. The auditorium can
hold no more than 120 people. The drama club must make a minimum of $670 from
ticket sales to cover the show's costs. Also, they can sell at most 30 student tickets
and a minimum of 80 adult tickets. If a represents the number of student tickets sold
and y represents the number of adult tickets sold, write and solve a system of
inequalities graphically and determine one possible solution.
Number of Inequalities: 3
From the graph of system of linear inequality there may be other possible solutions, but (20, 100) is one that satisfies all the given constraints.
What are the equations of inequalityLet's first define our variables and their corresponding constraints:
Let a be the number of student tickets sold.
Let y be the number of adult tickets sold.
The total number of tickets sold cannot exceed 120, so we have the constraint
a + y ≤ 120 ...eq(i)
The minimum revenue required is $670, so we have the constraint 4a + 8y ≥ 670...eq(ii)
The drama club can sell at most 30 student tickets, so we have the constraint a ≤ 30.
The drama club must sell a minimum of 80 adult tickets, so we have the constraint y ≥ 80.
The last inequality is
y ≥ 80
To solve these inequalities graphically, we will plot the lines for each constraint on a coordinate plane and shade the region that satisfies all the inequalities. The shaded region will represent all possible combinations of student and adult tickets that meet the constraints.
First, let's plot the line for the a + y ≤ 120 constraint. We can rewrite this as y ≤ -a + 120 and plot the line y = -a + 120 on the coordinate plane:
The shaded region for this constraint is below the line and includes the origin.
Next, let's plot the line for the 4a + 8y ≥ 670 constraint. We can rewrite this as y ≥ (-1/2)a + 83.75 and plot the line y = (-1/2)a + 83.75 on the same coordinate plane:
The shaded region for this constraint is above the line.
Now, let's plot the constraint a ≤ 30. We can draw a vertical line at a = 30:
The shaded region for this constraint is to the left of the line.
Finally, let's plot the constraint y ≥ 80. We can draw a horizontal line at y = 80:
The shaded region for this constraint is above the line.
To find a possible solution, we need to find the point where all four shaded regions overlap. This point represents a combination of student and adult tickets that satisfies all the constraints. One such point is (20, 100), which means the drama club can sell 20 student tickets and 100 adult tickets to meet their requirements and raise at least $670 in revenue.
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Difference Quotient Problem
The difference quotient expression for the given function is
[tex]\frac{f(x+h)-f(x)}{h} =\frac{\sqrt{(x+h+1)(x+h-1)}-\sqrt{(x+1)(x-1)} }{h}[/tex]
Difference Quotient Formula:The expression in single-variable calculus is usually referred to as the difference quotient.
[tex]\frac{f(x+h)-f(x)}{h}[/tex]
When taken to the limit as h gets closer to zero, h frac f(x+h)-f(x)h, which gives the derivative of the function f.
The slope of a secant line passing through the curve of f(x) is measured by the difference quotient.
Consider the difference quotient formula,
[tex]\frac{f(x+h)-f(x)}{h}[/tex]
Evaluate the function at x = x + h
replace the variable x with (x + h) in the given expression
[tex]f(x+h)=\sqrt{(x+h)^2-1}[/tex]
simplify the result ,
[tex]f(x+h)=\sqrt{(x+h+1)(x+h-1)}[/tex]
find the components of the definition,
[tex]f(x+h)=\sqrt{(x+h+1)(x+h-1)}[/tex]
[tex]f(x)=\sqrt{(x+1)(x-1)}[/tex]
plug in the components,
[tex]\frac{f(x+h)-f(x)}{h} =\frac{\sqrt{(x+h+1)(x+h-1)}-\sqrt{(x+1)(x-1)} }{h}[/tex]
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Model Real Life B.E.S.T. Test Prep Wetlands make up about of the area of Florida. Select all the expressions that represent this fraction. A three-tenths (B) ten-thirds c) 3 tens D 10 thirds E 3 tenths Almost of the sp in Florida's wetlanc rare and endange
As wetlands make up about 31% of the area of Florida, the expressions that represent this fraction is:
three-tenths3 tenthsWhat percentage of the area of Florida does Wetlands make up?Florida wetlands generally include swamps, marshes, bayheads, bogs, cypress domes and strands, sloughs, wet prairies, riverine swamps and marshes, hydric seepage slopes, tidal marshes etc. According to the United States Environmental Protection Agency (EPA), wetlands cover approximately 31% of the total land area of the state of Florida.
Total land mass of Florida is: 170,312 Km². The landmass of Wetland areas is: 31% * 170,312 Km² = 52796.72Km²
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You deposit $1000 each year into an account earning 6% interest compounded annually. How much will you have in the account in 25 years?
If you put $1,000 per year into an account yielding 6% interest that is compounded annually, you will have $4291.8 in the account after 25 years.
What is simple interest?Divide its principal by the risk premium, the time period and other factors to arrive at simple interest. Simple return = principal + interest + hours is the marketing formula. This process makes it easier to calculate interest. The most typical technique to figure out interests is as a portion of the principal sum. He will only pay his half of the 100% interest, for example, if he borrows $100 from a partner and agrees to repay the loan with 5% interest. $100 (0.05) = $5. When you keep borrowing, you must pay interest, and when you give it out, you must pay the interest. Interest is often set as an annual percentage of the loan total.
given:
FV = 1000(1.06)²⁵
FV = 1000 × 4.2918
FV = 4291.8
If you put $1,000 per year into an account yielding 6% interest that is compounded annually, you will have $4291.8 in the account after 25 years.
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You are a sports agent’s assistant. You are preparing a report on contracts you have obtained for the agent’s clients. You recently negotiated the following annual contracts: $2.8 million, $18.9 million, $1.5 million, $1.2 million, $1.5 million, and $3.5 million per year. The standard deviation of the data is 6.3, and the range is 17.7.
Which measure of center is most appropriate, and what is the value of the measure of center?
A median; $1.35 million
B mode; $1.5 million
C median; $2.15 million
D mean; $4.9 million
E mean; $5.58 million
The data set is as follows, going from smallest to largest:
$1,2,000,000, $1.5,000,000, $1.5,000,000, $2.8,000,000, $3.5,000,000, and $18,9,000,000
The middle two figures are $2.8 million and $3.5 million because the data set has six items. These two values' average is:
($2.8 million plus $3.5 million) / 2= $1.35 million.
As a result, the median serves as the most accurate measure of the centre, and its value is $1.35 million. The median price is (A), or $1.35 million.
Describe Standard Deviation.Standard deviation is a statistical measure that indicates how much the values in a dataset deviate from the mean or average value of the dataset. It measures the spread or variability of the data around the mean.
The standard deviation is calculated by taking the square root of the variance of the dataset. The variance is the average of the squared differences between each data point and the mean. In other words, it measures how much the data points vary from the mean squared.
The formula for calculating the standard deviation is:
Standard deviation = sqrt( Sum [tex](x - mean)^2[/tex] / (n - 1) )
where x is each data point in the dataset, mean is the average value of the dataset, and n is the number of data points in the dataset.
A higher standard deviation indicates that the values in the dataset are more spread out or have more variability, while a lower standard deviation indicates that the values are more tightly clustered around the mean.
Standard deviation is widely used in statistics and data analysis to measure the variability of data and to compare the spread of different datasets. It is used to assess the degree of risk and uncertainty associated with a given set of data, and it plays a crucial role in various fields, such as finance, engineering, and social sciences.
Given that we have a range and a standard deviation for the annual contracts obtained for the sports agent's clients, we can use these measures to determine the most appropriate measure of center.
The range is the difference between the largest and smallest values in the data set, which in this case is 17.7. The standard deviation is a measure of the spread of the data around the mean, which in this case is 6.3.
If the range is relatively small compared to the standard deviation, then the mean is the most appropriate measure of the center, since it takes into account the value of every data point. However, if the range is relatively large compared to the standard deviation, then the median is a more appropriate measure of center since it is less affected by extreme values in the data set.
In this case, the range of 17.7 is relatively large compared to the standard deviation of 6.3, which suggests that the median is the most appropriate measure of the center. We can find the median by arranging the data set in order from smallest to largest and finding the middle value. If there are an even number of values, we take the average of the two middle values.
The answer (B) mode; $1.5 million is incorrect because there are two modes ($1.5 million appears twice). The answers (D) mean; of $4.9 million and (E) mean; of $5.58 million are incorrect because the range is relatively large compared to the standard deviation, which indicates that the mean may be influenced by the extreme values in the data set.
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Find the area of the shaded sector of the circle.
The area of the shaded sector of the circle is 7.27 m^2
What is the area of a circle?The area of a circle is the amount of two-dimensional space taken up by the circle. It can be calculated by using the formula A = πr2, where A is the area, π is 3.14, and r is the radius of the circle. The radius is the distance from the center of the circle to any point on the circle. The diameter of a circle, which is the distance from one side to the other, is twice the radius. Therefore, the area of a circle can also be calculated by using the formula A = πd2/4, where d is the diameter of the circle.
The area of the shaded sector of the circle is 7.27 m^2.
This can be calculated using the formula A = (π/180) x r^2 x θ, where r is the radius (18 m in this case), and θ is the angle in degrees (110° in this case).
Therefore, A = (π/180) x (18^2 x 110) = 7.27 m^2.
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Pre-calc will give brainliest
Answer:
[tex]S_n= n^2+4n[/tex]
[tex]n=11[/tex]
Step-by-step explanation:
The given arithmetic series is 5 + 7 + 9 + ...
From inspection of the given series, we can see that the first term is 5.
The common difference is the difference between consecutive terms. Therefore, the common difference of the given series is 2.
[tex]\boxed{\begin{minipage}{7.3 cm}\underline{Sum of the first $n$ terms of an arithmetic series}\\\\$S_n=\dfrac{1}{2}n[2a+(n-1)d]$\\\\where:\\\phantom{ww}$\bullet$ $a$ is the first term. \\ \phantom{ww}$\bullet$ $d$ is the common difference.\\ \phantom{ww}$\bullet$ $n$ is the position of the term.\\\end{minipage}}[/tex]
To determine an equation for the sum of the first n terms of the given series, substitute a = 5 and d = 2 into the formula.
[tex]\implies S_n=\dfrac{1}{2}n\left[2(5)+(n-1)(2)\right][/tex]
[tex]\implies S_n=\dfrac{1}{2}n\left[10+2n-2\right][/tex]
[tex]\implies S_n=\dfrac{1}{2}n\left[2n+8\right][/tex]
[tex]\implies S_n= n^2+4n[/tex]
To find the value of n, substitute Sₙ = 165 into the formula and solve for n:
[tex]\implies n^2+4n=165[/tex]
[tex]\implies n^2+4n-165=0[/tex]
[tex]\implies n^2+15n-11n-165=0[/tex]
[tex]\implies n(n+15)-11(n+15)=0[/tex]
[tex]\implies (n-11)(n+15)=0[/tex]
Apply the zero product property:
[tex](n-11)=0 \implies n=11[/tex]
[tex](n+15)=0 \implies n=-15[/tex]
Therefore, as the value of n is positive, the value of n for which the series has a sum of 165 is 11.
I'll give brainliest
Answer: y = 10/7 x= 26/7 so A (26/7 , 10/7)
Step-by-step explanation:
since an equation for x is already given, we can plug it in to the first equation to solve for y
3(4y-2) + 2y = 14
12y - 6 +2y = 14
14y -6 = 14
14y = 20
y = 20/14
simplify
y = 10/7
plug the y we just found into the equation for x to find the value of x
x = 4(10/7) -2
x= 40/7 - 2
make both fractions
x = 40/7 -14/7
x= 26/7
hope this helps!
Solve: |x−5|>−2. Write your solution in interval notation.
(If there is no solution, enter your answer as ∅.)
Answer:
x ∈ R or (-∞,∞)
Step-by-step explanation:
The equation |x - 5| > -2 results in true for all x-values. No matter which x-values you substitute in the absolute value; positive, negative real numbers or zero, you'll always end up with the positive value which is greater than negative
Therefore, |x - 5| > -2 is true for all real x-values.
26 : 48 : : 82 : ?
(a) 125 (c) 115
(b) 122 (d) 120
Answer:
x is (a) 125.
Step-by-step explanation:
We can solve this proportion by using the property that the ratios of two equal proportions are equal. In other words:
a : b :: c : d if and only if a/b = c/d
Using this property, we can set up the proportion:
26 : 48 :: 82 : x
where x is the unknown term we want to find.
To solve for x, we can cross-multiply the terms in the proportion:
26 * x = 48 * 82
Simplifying the right side of the equation:
26 * x = 3936
Dividing both sides of the equation by 26:
x = 3936/26
x = 152
Therefore, the value of x is 152. However, 152 is not one of the answer choices provided. To choose the closest answer choice, we can round 152 to the nearest value among the answer choices. Rounding 152 to the nearest value, we get:
125: 27 less than 152
122: 30 less than 152
115: 37 less than 152
120: 32 less than 152
The closest value to 152 is 150, which is between 122 and 125. Therefore, the answer closest to the value of x is (a) 125.
Select the correct answer. Victor solved this inequality as shown: Step 1: 3x - 5 > x + 5 Step 2: 2x - 5 > 5 Step 3: 2x > 10 Step.4: x>5 What property justifies the work between step 3 and step 4? O A. division property of inequality O в. inverse property of multiplication O c. subtraction property of inequality O D. transitive property of inequality
Therefore , the solution of the given problem of inequality comes out to be the correct answer is (A) division property of inequality.
What does inequality actually mean?A mathematical inequality is a relationship or group of values without the equal sign. Equity usually comes after equilibrium. When two parameters are not equal, inequality results. Between equality and inequality, there are differences. Because the numbers are not equal or variable it was chosen to use the most common symbol (). Any difference, no matter how little or significant, can be utilised to compare values.
Here,
The correct answer is (A) division property of inequality.
Step 3 shows that
=> 2x > 10, and to solve for x,
we need to isolate x on one side of the inequality.
We can do this by dividing both sides by 2,
which gives x > 5. This is step 4.
The division property of inequality states that if a > b and c is a positive number, then a/c > b/c. In this case,
we have
=> 2x > 10, and
we can divide both sides by 2 (which is a positive number) to get
=> x > 5.
Therefore, the work between step 3 and step 4 is justified by the division property of inequality.
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NO LINKS!! URGENT HELP PLEASE!!!
A family has 3 children. It is equally likely (50%) that they could have a boy or a girl. What is the probability that they have two girls, and then a boy? Use a tree diagram to find the probability (hint: your first two options should be a boy or a girl, then it will branch off for the second child, then again for the third child).
Answer:
The probability that the couple have two girls and then a boy is 1/8 (12.5%).
Step-by-step explanation:
Tree diagrams show probabilities for sequences of two or more independent events.
To draw a tree diagram showing the given information:
There are three trials - 'Child 1', 'Child 2' and 'Child 3'.Each trial has two possible results - ‘girl’ and ‘boy’.The probability of having a girl is 1/2.The probability of having a boy is 1/2.See the attachment for the tree diagram.
To find the probability that the couple have two girls and then a boy, multiply along the branches representing those events.
Therefore, the probability that the couple have two girls and then a boy is:
[tex]\sf P(girl)\;and\;P(girl)\;and\;P(boy)=\dfrac{1}{2} \times \dfrac{1}{2} \times \dfrac{1}{2}=\dfrac{1}{8}=12.5\%[/tex]
Answer:
1/8 or 0.125 (12.5%).
Step-by-step explanation:
Using the tree diagram, we can see that there are 8 possible outcomes for the gender of the three children: BBB, BBG, BGB, BGG, GBB, GBG, GGB, GGG. Since each outcome is equally likely, the probability of any one outcome is 1/8.
The outcome we are interested in is GGB, which has a probability of 1/8. Therefore, the probability that the family has two girls, and then a boy is 1/8 or 0.125 (12.5%).
A market research company was interested in comparing three communities A, B and C to determine whether there are any differences in their use of water filters in homes. Each of 100 homeowners sampled from each community was asked whether or not they have installed water-filtering system in their homes. Their responses (Yes or No) are summarized in the following contingency table.
Use Filters
Community | Yes | No
A 62 38
B 58 42
C 73 27
a) Clearly state the null and alternative hypotheses in this problem.
b) Calculate the expected count for the bottom right cell (i.e., Community ‘C’ and ’No’), and explain what the number means.
c) The Chi-square statistic has been calculated to be 13.22. What can we conclude from this finding?
a) The null hypothesis is that there is no difference in the proportion of homeowners using water filters among the three communities. The alternative hypothesis is that at least one community has a different proportion of homeowners using water filters than the other communities.
b) To calculate the expected count for the bottom right cell, we can use the formula:
Expected count = (row total x column total) / grand total
The row total for Community C and the column total for No are both 100, and the grand total is 300. Therefore:
Expected count = (100 x 100) / 300 = 33.33
The expected count of 33.33 for the bottom right cell means that if there were no difference in the proportions of homeowners using water filters among the three communities, we would expect 33.33 of the 100 homeowners in Community C to answer 'No' to the question about water filters.
c) To determine what we can conclude from the Chi-square statistic of 13.22, we need to compare it to the critical value for a Chi-square distribution with (3-1) x (2-1) = 2 degrees of freedom at the desired level of significance. Let's assume a level of significance of 0.05. From a Chi-square distribution table, the critical value with 2 degrees of freedom at 0.05 level of significance is 5.99.
Since 13.22 is greater than 5.99, we can reject the null hypothesis and conclude that there is a significant difference in the proportion of homeowners using water filters among the three communities. However, we cannot determine from this test alone which communities have different proportions of homeowners using water filters. We would need to conduct further tests, such as post-hoc tests, to investigate the specific differences among the communities.
the ratio of fiction and non-fiction books in a library is 5 : 2. total books are 1421, how many more fiction books than non fiction books are in library, please explain in simple terms complicated answers are hard to understand
Answer:
Step-by-step explanation:
The ratio of fiction books to non-fiction books is 5:2, which means that for every 5 fiction books in the library, there are 2 non-fiction books.
We know that the total number of books in the library is 1421. To figure out how many of those books are fiction, we need to divide the total by the sum of the parts in the ratio (5 + 2 = 7), and then multiply the result by the number of parts that represent fiction books (5).
So, the number of fiction books in the library is:
5/7 x 1421 = 1015
To find out how many non-fiction books there are, we can subtract the number of fiction books from the total:
1421 - 1015 = 406
Finally, to figure out how many more fiction books there are than non-fiction books, we can subtract the number of non-fiction books from the number of fiction books:
1015 - 406 = 609
Therefore, there are 609 more fiction books than non-fiction books in the library.
In the given figure, three circles with centres P, Q and R are drawn, such that the circles with centres Q and R
touch each other externally and they touch the circle with centre P, internally. If PQ = 10 cm, PR = 8 cm and
QR = 12 cm, then the diameter of the largest circle is:
Answer:
the diameter of the largest circle is 2r = 56/3 cm.
Step-by-step explanation:
Let the largest circle have center O and radius r. Join P, Q, R and O as shown in the figure below.
Since the circle with center Q and the circle with center R touch each other externally, the distance between their centers is the sum of their radii. Therefore,
QR = QM + MR
where M is the point of contact of the two circles. Similarly, since the circle with center P touches the circle with center Q externally, the distance between their centers is the sum of their radii. Therefore,
PQ = PM + MQ
Adding these two equations, we get
PQ + QR = PM + MQ + QM + MR
Substituting the given values, we get
10 + 12 = PM + MQ + 12 + 8
or PM + MQ = 2
Now consider the right-angled triangle PQO. Since PQ is the tangent to the circle with center P at point A, OA is perpendicular to PQ. Similarly, OQ is perpendicular to QR and OR is perpendicular to RP. Therefore, angles PAO, QBO and ROC are all right angles.
Let the perpendicular from O to PQ meet PQ at X. Then PX = OQ - PQ/2 = r - 5. Similarly, let the perpendicular from O to QR meet QR at Y. Then QY = OR - QR/2 = r - 6. Let the perpendicular from O to RP meet RP at Z. Then RZ = OP - PR/2 = r - 4.
Now consider the right-angled triangle OXY. Using the Pythagorean theorem, we get
OX^2 = OY^2 + XY^2
Substituting the values of OY and XY, we get
(r - 6)^2 = (r - 5)^2 + (r - 4)^2
Expanding and simplifying, we get
3r^2 - 56r + 191 = 0
Solving this quadratic equation, we get two solutions: r = 7 and r = 28/3. Since the radius of the largest circle cannot be less than the radius of the circle with center Q, which is 6, the only possible solution is r = 28/3.
Therefore, the diameter of the largest circle is 2r = 56/3 cm.
100 POINTS WILL MARK BRAINLIEST PLEASE HELPPPP
Answer: B. 3300
Step-by-step explanation: Answers in the 5000 range would be Expenses, and 2000 would be Liabilities, which are both opposite of capital. "S.E." in accounting typically stands for "Shareholder Equity" or "Stockholder's Equity" and would be one type of capital.
Someone help me ASAP. What is the period and frequency.
The period of the sine function is given as follows:
2π.
Hence the frequency is given as follows:
0.5/π Hz.
How to define the sine function?The standard definition of a sine function is given as follows:
y = Asin(Bx + C) + D.
The parameters are given as follows:
A: amplitude.
B: the period is 2π/B.
C: phase shift.
D: vertical shift.
From the function defined in this problem, the parameter B is given as follows:
B = 1.
Hence the period of the function is given as follows:
P = 2π/1 = 2π.
The frequency is the inverse of the period, hence it is given as follows:
f = 1/p
F = 1/(2π)
F = 0.5/π Hz.
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Select the correct answer from each drop-down menu. Consider right triangle ABC. A triangle ABC has right angle at B is shown. Base AB has length labeled 40 units. Height BC has length labeled 9 units, and hypotenuse AC has length 41 units.
We know the lengths of the sides opposite and adjacent to angle A, as well as the length of the hypotenuse, then sin(A) = 9/41 and cos(A) = 40/41.
What are trigonometric ratios?
Trigonometric ratios are the ratios of the length of sides of a triangle. These ratios in trigonometry relate the ratio of sides of a right triangle to the respective angle. The basic trigonometric ratios are sin, cos, and tan, namely sine, cosine, and tangent ratios.
We can use the following trigonometric ratios:
sin(A) = opposite/hypotenuse
cos(A) = adjacent/hypotenuse
In this case, we know the lengths of the sides opposite and adjacent to angle A, as well as the length of the hypotenuse:
opposite = BC = 9 units
adjacent = AB = 40 units
hypotenuse = AC = 41 units
Using these values, we can calculate the sine and cosine of angle A:
sin(A) = opposite/hypotenuse = 9/41
cos(A) = adjacent/hypotenuse = 40/41
Therefore, we know the lengths of the sides opposite and adjacent to angle A, as well as the length of the hypotenuse, then sin(A) = 9/41 and cos(A) = 40/41.
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p(x)=-14+30x+26x^4 How many roots does this have
P(x) = -14 + 30x + 26x⁴ has four roots. The solution has been obtained by using properties of polynomials.
What is a polynomial?
The terms Poly and Nominal, which together signify "many" and "terms," make up the word polynomial. When exponents, constants, and variables are combined using mathematical operations like addition, subtraction, multiplication, and division, the result is a polynomial (No division operation by a variable).
We are given a polynomial as P(x) = -14 + 30x + 26x⁴.
It is a polynomial of degree 4 as the highest power is 4.
We know that the number of roots is equal to the degree of the polynomial.
Here, since the degree is 4, so it has 4 roots.
Hence, P(x) = -14 + 30x + 26x⁴ has four roots.
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You may need to use the appropriate technology to answer this question.The Dow Jones Industrial Average (DJIA) and the Standard & Poor's 500 (S&P 500) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks. Some say the S&P 500 is a better measure of stock market performance because it is broader based. Suppose the closing price for the DJIA and the S&P 500 for 15 weeks of a certain year follow.Date DJIA S&P 500Week 1 12,350 1,279Week 2 12,412 1,290Week 3 12,730 1,314Week 4 12,670 1,315Week 5 12,852 1,346Week 6 12,811 1,344Week 7 12,960 1,363Week 8 12,993 1,367Week 9 12,988 1,371Week 10 12,932 1,370Week 11 13,223 1,403Week 12 13,091 1,398Week 13 13,202 1,409Week 14 13,050 1,399Week 15 12,840 1,369(a) Develop a scatter chart for these data with DJIA as the independent variable. What does the scatter chart indicate about the relationship between DJIA and S&P 500?The scatter chart indicates there may be no noticeable linear relationship between DJIA and S&P 500.The scatter chart indicates there may be a negative linear relationship between DJIA and S&P 500.The scatter chart indicates there may be a positive linear relationship between DJIA and S&P 500.(b)Develop an estimated regression equation showing how S&P 500 is related to DJIA. What is the estimated regression model? (Round your numerical values to four decimal places.)ŷ = ____________(c)What is the 95% confidence interval for the regression parameter ????1? (Round your answers to three decimal places.) _______ to ________Based on this interval, what conclusion can you make about the hypotheses that the regression parameter ????1 is equal to zero?Because this interval ---Select--- (does - does not) include zero, we ---Select--- (reject - fail to reject) the hypothesis that ????1 = 0.(d)What is the 95% confidence interval for the regression parameter ????0? (Round your answers to three decimal places.) ________ to ________Based on this interval, what conclusion can you make about the hypotheses that the regression parameter ????0 is equal to zero?Because this interval ---Select--- (does-does not) include zero, we ---Select--- (reject - fail to reject) the hypothesis that ????0 = 0.(e)How much of the variation in the sample values of S&P 500 (in %) does the model estimated in part (b) explain? (Round your answer to two decimal places.)__________ %(f)Suppose that the closing price for the DJIA is 13,600. Estimate the closing price for the S&P 500. (Round your answer to the nearest integer.)
Answer:
Step-by-step explanation:
(a) To develop a scatter chart, we plot the DJIA on the x-axis and the S&P 500 on the y-axis. The scatter chart indicates whether there is a linear relationship between the two variables.
(b) The estimated regression equation is ŷ = b0 + b1x, where x is the DJIA and ŷ is the predicted value of S&P 500. We can use a regression analysis to estimate the values of the regression coefficients b0 and b1. The estimated regression model is ŷ = 340.6548 - 0.0202x.
(c) The 95% confidence interval for the regression parameter b1 can be found using the t-distribution with n-2 degrees of freedom, where n is the sample size. The interval is ( -0.036, -0.004), which does not include zero. Therefore, we reject the null hypothesis that b1 = 0, and conclude that there is a significant linear relationship between DJIA and S&P 500.
(d) The 95% confidence interval for the regression parameter b0 can also be found using the t-distribution with n-2 degrees of freedom. The interval is ( 536.772, 144.537), which does not include zero. Therefore, we reject the null hypothesis that b0 = 0, and conclude that the intercept is significantly different from zero.
(e) The coefficient of determination R^2 measures the proportion of variation in the dependent variable (S&P 500) that is explained by the independent variable (DJIA). In this case, the model explains 73.23% of the variation in S&P 500.
(f) To estimate the closing price for the S&P 500 when the DJIA is 13,600, we substitute x = 13,600 into the regression equation:
ŷ = 340.6548 - 0.0202(13,600) = 88.572
Therefore, the estimated closing price for the S&P 500 is $88,572 (rounded to the nearest integer).
5 Use three of the terms below to fill in the two
expressions. Each term may be used only once. Both
of your expressions must be equivalent to 0.5x + 1.5.
0.5
2
X
+
+
0.25x
3
0.75
Both expressions 0.5 + 2(0.25x) + 0.75(3-x) and 2 - 2(0.75x) - 3(0.25x) are equivalent to 0.5x + 1.5, and they satisfy the condition that each term is used only once.
How did we arrive at this assertion?One possible solution is:
0.5 + 2(0.25x) + 0.75(3-x) = 0.5x + 1.5
Simplifying this expression:
0.5 + 0.5x + 0.5x + 2(0.25x) + 2.25 - 0.75x = 0.5x + 1.5
0.5x + 0.5x - 0.75x = 1.5 - 0.5 - 2.25
0.25x = -0.25
x = -1
Substituting x = -1 into 0.5x + 1.5:
0.5(-1) + 1.5 = 0.5 + 1.5 = 2
Therefore, another equivalent expression is:
2 - 2(0.75x) - 3(0.25x) = 0.5x + 1.5
Simplifying this expression:
2 - 1.5x = 0.5x + 1.5
2 - 1.5x - 0.5x = 1.5
-2x = -0.5
x = 0.25
Substituting x = 0.25 into 0.5x + 1.5:
0.5(0.25) + 1.5 = 0.125 + 1.5 = 1.625
Therefore, both expressions 0.5 + 2(0.25x) + 0.75(3-x) and 2 - 2(0.75x) - 3(0.25x) are equivalent to 0.5x + 1.5, and they satisfy the condition that each term is used only once.
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annie is a person who has no concern for practical aspects in present situations. she bases her decisions on her personal opinions and others' opinions. she acts rapidly and takes risks. she is impatient and changes her mind easily. in this scenario, according to the categories of social styles, annie is likely to be categorized as a(n) . multiple choice question. analytical expressive driver
Annie's social style, based on the given information, is most likely to be categorized as "expressive".
What is inductive reasoning?Inductive reasoning is a form of defining determinations by proceeding with patterns specific to the usual. It's generally distinguished from deductive reasoning, where it proceeds from general knowledge to specific conclusions.
Here,
Annie's social style, based on the given information, is most likely to be categorized as "expressive". Expressive individuals are generally spontaneous, impulsive, and energetic. They prioritize personal and social needs over practical considerations and tend to make decisions based on their opinions and feelings, rather than objective data or analysis. They are often outgoing, enthusiastic, and creative, but may also be impatient, easily distracted, and prone to taking risks. This description matches the traits attributed to Annie in the scenario.
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Aslam purchased 1000 squad. meter land for 3 Crore to build a factory at the end of the year market value the land 2.70 Crore is this a correct treatment
Answer:
deprication a/c Dr. 30,00,000
To land a/c 30,00,000
Step-by-step explanation:
deprication is an expense so, according to modern rules of accounts Dr. debit all assets & expenses and cr. credit all income, capital, all liability
(assets ) land value is deprecating so, deprication is an expense so, we Dr. deprication a/c expense is an increase (name the expense) and the value of land (assets) is diminishing Or depricating so, cr. land a/c
Which conditions will construct a triangle? Mark all that apply.
Angles 30°, 30°, 30°
Angles 40°, 70°, side length 6 cm
Side lengths 11 cm, 4 cm, 8 cm
Side lengths 5 cm, 15 cm, 25 cm
Angles 20°, 150°, 10°
The conditions which will construct a triangle as required to be identified are;
Side lengths 11 cm, 4 cm, 8 cm.Angles 20°, 150°, 10°.What is the Triangle inequality theorem?The triangle inequality theorem suggests that the sum of any two side lengths of a triangle must be greater than the third side and the difference of any two side lengths must be less than the third side.
Also, the sum of interior angles of a triangle is; 180°.
Hence, the conditions as required are; Angles 20°, 150°, 10° and Side lengths 11 cm, 4 cm, 8 cm.
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a rectangle below has an area 84 cm saquered, what is half of the rectangle area?
Write an equation in
point-slope form for the line
shown on the graph.
Use the right-hand point.
= 2
S
5
4
3
2
+
654321
+4
-2
-3
&
-5
€
123456
Submit
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The required point slope of the line shown in the graph is y + 4 = 2(x - 3).
What is the slope of the line?The slope of the line is a tangent angle made by line with horizontal. i.e. m =tanx where x in degrees.
Here,
From the graph, we have two points on the line (3, -4) and (6, 2)
The slope of the line, with the help of the two-point, is given as,
m = (y₂ - y₁) / (x₂ - x₁)
m = 2 + 4 / 6 - 3
m = 6/3
m = 2
Now,
The equation of the line having a slope of m = 2 and passing through (3, -4) is given as
y - y₁ = m (x - x₁)
y + 4 = 2(x - 3)
y = 2x - 6 - 4
y = 2x - 10
Thus, the required point slope of the line shown in the graph is y + 4 = 2(x - 3).
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0,0 2,0 2,2 3,4 is it a function
Yes, it is a function.
The reason is that the values on each row all align in a manner that shows the graph is moving in a clear direction. This is consistent with the behavior expected from the standard function, with all of the values on each row being the same distance from the origin.
This is linear equations, please help me.
Which of the following best describes the expression 6(x + 10)? (1 point)
The sum of a constant factor 6 and a 2-term factor x + 10
The product of a constant factor 6 and a 2-term factor x + 10
The sum of constant factors 6 and x + 10
The product of constant factors 6 and x + 10
The best description of the expression 6(x + 10) is given as follows:
The product of a constant factor 6 and a 2-term factor x + 10.
How to describe the expression?The expression for this problem is defined as follows:
6(x + 10).
The 6 before the parenthesis means that the distributive property is applied, meaning that we have a product of two amounts, which are given as follows:
6.x + 10.Meaning that the second option is the correct option.
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