The series is not geometric.
What is geometric series?
In mathematics, the geometric series means the sum of the terms that have a common ratio between every adjacent two terms of them. There can be two types of geometric series: finite and infinite.
The given series is
3 , 3z, 6z², 9z³
The given series is either geometric or not.
The initial term or the first term is 3 which also can be written as 3z⁰
Ratio between successive terms can be determined by
second term/ first term
Here second term is 3z and first term is 3
So the ratio is 3z/3
= z
If the series is geometric then
it must be equal to 6z²/ 3z= 2z and 9z³/ 6z² = (3/2)z
The ratios are not equal to each other.
Hence, the series is not geometric.
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Which of the following circle graphs correctly represents the data in the table? a circle graph with four sections, labeled turkey 30 percent, ham 20 percent, chicken 35 percent, and vegetarian 15 percent a circle graph with four sections, labeled vegetarian 30 percent, turkey 20 percent, ham 35 percent, and chicken 15 percent a circle graph with four sections, labeled chicken 30 percent, vegetarian 20 percent, turkey 35 percent, and ham 15 percent a circle graph with four sections, labeled ham 30 percent, chicken 20 percent, vegetarian 35 percent, and turkey 15 percent
The circle graph that correctly represents the data in the table is that with: A. four sections, labeled turkey 30 percent, ham 20 percent, chicken 35 percent, and vegetarian 15 percent correctly represents the data in the table.
How to find the correct circle graphTo find the percentage for each type of sandwich, we can divide the number of customers who ordered that sandwich by the total number of customers (100) and multiply by 100.
Using the data given in the table, we get:
Turkey: 30/100 x 100% = 30%
Ham: 20/100 x 100% = 20%
Chicken: 35/100 x 100% = 35%
Vegetarian: 15/100 x 100% = 15%
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need help ASAP!!! Please help! I’m having trouble!
The Surface Area of wooden box is 432 inch².
We have,
length = 12 inch
width = 8 inch
Height = 6 inch
So, Surface Area of wooden box
= 2 (lw + wh + lh)
= 2 (96 + 48 + 72)
= 2 x 216
= 432 inch²
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We might choose to display data with a stemplot rather than a boxplot because a stem plot I. reveals the shape of the distribution.
II. is better for large datasets.
III. displays the actual data.
Statements I, II, and III are partially correct, but statement II needs to be corrected to indicate that stem plots are better for small to moderate-sized datasets.
We might choose to display data with a stem plot rather than a boxplot because:
Reveals the shape of the distribution.
Is better for small to moderate-sized datasets.
Displays the actual data.
A stem plot is a type of graph that shows the distribution of data by grouping the observations into stems and leaves.
It allows for the display of the actual data values, which is not possible in a boxplot.
Additionally, stem plots are particularly useful for small to moderate-sized datasets as they provide a detailed view of the distribution, allowing for the identification of patterns such as skewness, multimodality, and outliers.
On the other hand, boxplots are better for large datasets as they provide a more concise summary of the distribution, including information about the median, quartiles, and outliers, while still conveying information about the spread and shape of the distribution.
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if the inverse demand function for toasters is p=100-20 what is the consumer surplus if price is $35? The consumer surplus is $ (round your answer to two decimal places)
Given the inverse demand function p = 100 - 20q for toasters and a price of $35, we can find the consumer surplus.
First, we'll find the quantity demanded at the given price:
35 = 100 - 20q
20q = 100 - 35
q = (100 - 35) / 20
q = 65 / 20
q = 3.25
Now, to find the consumer surplus, we'll use the formula:
Consumer Surplus = (1/2) × Base × Height
The base represents the quantity (q = 3.25) and the height is the difference between the maximum willingness to pay (p = 100) and the actual price (p = 35).
Consumer Surplus = (1/2) × 3.25 × (100 - 35)
Consumer Surplus = 0.5 × 3.25 × 65
Consumer Surplus = 105.625
So, the consumer surplus is $105.63 when rounded to two decimal places.
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PLEASEEE PLEASEEE HELP ITS THE LAST QUESTION HURRYYY
Answer: C Q
Step-by-step explanation:
You need to Use Q And C In algebra if thats what your going for. Hopefully this help's.
The base of an isosceles triangle is 50 cm and the length of one of its legs is 65 cm. (4 points) (a) Find the height of the isosceles triangle
If the base of an isosceles triangle is 50 cm and the length of one of its legs is 65 cm, the height of the isosceles triangle is 60 cm.
To find the height of the isosceles triangle, we need to use the Pythagorean theorem and the properties of isosceles triangles.
First, we draw a diagram of the triangle and label the known values. We know that the base is 50 cm and one of the legs is 65 cm. Since the triangle is isosceles, the other leg is also 65 cm.
Next, we can draw a perpendicular line from the top vertex to the base, which represents the height of the triangle. We can label this height as "h".
Now, we have a right triangle with a base of 50 cm, a hypotenuse of 65 cm, and a height of "h". We can use the Pythagorean theorem to find the value of "h":
h² + 25² = 65²
h² + 625 = 4225
h² = 3600
h = 60
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Which term is a constant numerical value in w/4+12.5-7z????
help me i need help with what I’m doing!
Explanation:
The w/4 term is the same as (1/4)w or 0.25w since 1/4 = 0.25
Because a variable is attached to this term, it is not constant. The same can be said about the -7z term as well.
The 12.5 is constant. It never changes. It will always be 12.5 no matter what the other variable terms change to.
For example, if w = 12, then the term w/4 becomes 12/4 = 3. Or if w = 24, then w/4 = 24/4 = 6 is the new value. This shows that term changing depending on the input variable.
Find the total surface area of this triangular prism
Answer:
2(1/2)(8)(15) + 17(2) + 8(2) + 15(2)
= 200 cm^2
A jeweler had a fixed amount of gold to make bracelets and necklaces. The amount of gold in each bracelet is 6 grams and the amount of gold in each necklace is 24 grams. The jeweler made a total of 16 bracelets and necklaces using 258 grams of gold. Determine the number of bracelets made and the number of necklaces made.
Using a system of equations, the number of bracelets made and the number of necklaces made are:
Bracelets = 7Necklaces = 9.What is a system of equations?A system of equations is two or more equations that can be solved simultaneously or at the same time.
Simultaneous equations can be solved concurrently.
Quantity of gold in each bracelet = 6 grams
Quantity of gold in each necklace = 24 grams
The total number of bracelets and necklaces made = 16
The total quantity of gold used in making the 16 pieces = 258 grams
Let the number of bracelets made = x
Let the number of necklaces made = y
Equations:x + y = 16 ...Equation 1
6x + 24y = 258 ...Equation 2
Multiply Equation 1 by 6:
6x + 6y = 96 ...Equation 3
Subtract Equation 3 from Equation 2:
6x + 24y = 258
-
6x + 6y = 96
18y = 162
y = 9
x = 7 (16 - 9)
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Question 15(Multiple Choice Worth 2 points)
(Comparing Data MC)
The line plots represent data collected on the travel times to school from two groups of 15 students.
A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 4, 6, 14, and 28. There are two dots above 10, 12, 18, and 22. There are three dots above 16. The graph is titled Bus 47 Travel Times.
A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 8, 9, 18, 20, and 22. There are two dots above 6, 10, 12, 14, and 16. The graph is titled Bus 18 Travel Times.
Compare the data and use the correct measure of center to determine which bus typically has the faster travel time. Round your answer to the nearest whole number, if necessary, and explain your answer.
Bus 18, with a median of 13
Bus 47, with a median of 16
Bus 18, with a mean of 13
Bus 47, with a mean of 16
Based on the medians, we can conclude that Bus 47 typically has a faster travel time than Bus 18. The median travel time for Bus 47 is 16 minutes, which is 3 minutes faster than the median travel time for Bus 18, which is 13 minutes.
Travel time calculation.
To determine which bus typically has the faster travel time, we need to compare the measures of center for each data set. Since the data sets are relatively small and appear to have some outliers, the median is the more appropriate measure of center to use in this case, as it is less affected by extreme values than the mean.
For Bus 47, the median is 16, which means that half of the students take less than 16 minutes to travel to school on that bus, and half take more than 16 minutes.
For Bus 18, the median is 13, which means that half of the students take less than 13 minutes to travel to school on that bus, and half take more than 13 minutes.
Therefore, based on the medians, we can conclude that Bus 47 typically has a faster travel time than Bus 18. The median travel time for Bus 47 is 16 minutes, which is 3 minutes faster than the median travel time for Bus 18, which is 13 minutes.
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At the store you can buy a bag with red and green apples in it. If 60% of the bag is red apples and there are 36 red apples, how many total apples are in the bag?
Group of answer choices
A. 58
B. 60
C. 62
D. 54
There are 60 apples in the bag
How to calculate the total number of apples that is in the bag?Let y represent the total number of apples that is in the bag
36/y= 60/100
cross multiply both sides
60y= 36×100
60y= 3600
Divide both sides by the coefficient of y which is 60
60y/60= 3600/60
y= 60
Hence the total number of apples in the bag is 60 apples
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200 sheets of paper from a printing press were inspected for smeared ink. Of the 200 sheets of paper, 17 sheets contained smeared ink. Assuming a 99% two-sided confidence interval, what is the confidence interval of the proportion smeared
Thus, with 99% confidence, we can say that the proportion of smeared ink in the 200 sheets of paper inspected falls between 1.3% and 15.7%.
To calculate the confidence interval of the proportion smeared in 200 sheets of paper inspected for smeared ink, we can use the formula:
Confidence Interval = sample proportion ± (critical value) x (standard error)
The sample proportion is the number of sheets containing smeared ink divided by the total number of sheets inspected, which is 17/200 = 0.085.
The critical value for a 99% two-sided confidence interval with 200 observations can be found using a t-distribution table or calculator, and is approximately 2.576.
The standard error can be calculated as the square root of [(sample proportion) x (1 - sample proportion) / sample size], which is the square root of [(0.085) x (1 - 0.085) / 200] = 0.028.
Plugging in these values, we get:
Confidence Interval = 0.085 ± (2.576) x (0.028)
Confidence Interval = 0.085 ± 0.072
Confidence Interval = (0.013, 0.157)
Therefore, with 99% confidence, we can say that the proportion of smeared ink in the 200 sheets of paper inspected falls between 1.3% and 15.7%. This means that we are 99% confident that the true proportion of smeared ink in the population of printed sheets falls within this range.
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Think of a number. The L C M of this number and 42 is 126. If the number lies between 60 and 70, what is the number
The LCM of 63 and 42 is 126 where 63 is the required number lying in between 60 and 70.
Let the missing number be x.
The number x lies in between 60 and 70.
The LCM ( Least Common Multiple) refers to the least value that is divisible by any two (or more) numbers.
Here LCM of x and 42 is 126.
Simplifying 126 we can write it as,
126 = 2*3*21
Thus, one of the number having 126 is as multiple is 42 (as already given).
The other number, that is x, having 126 as multiple lying between 60 and 70 is,
x = 3*21 = 63
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solve the equation -75=y^3+50
Answer: y = -5
Step-by-step explanation:
We move the constants to one side to get y^3 = -125.
Then, we cube root both sides to get y = -5.
Please help!!! It would be highly appreciated!!!
Answer:
-x⁵ +3x² +3x +C
Step-by-step explanation:
You want the indefinite integral of (-5x⁴ +6x +3).
Power ruleThe power rule for integration is the reverse of the power rule for derivatives.
[tex]\begin{array}{ll}\text{Derivative:}&\dfrac{d(x^n)}{dx}=n\cdot x^{n-1}\\\\\text{Integral:}&\displaystyle\int {x^n}\,dx=\dfrac{x^{n+1}}{n+1}\end{array}[/tex]
ApplicationAn indefinite integral represents a family of functions, each with the same derivative. In general, they may differ by a constant. That constant is necessary to signify the functions that will have the given expression as their derivative.
[tex]\displaystyle\int {(-5x^4+6x+3)}\,dx=-5\dfrac{x^{4+1}}{4+1}+6\dfrac{x^{1+1}}{1+1}+3\dfrac{x^{0+1}}{0+1}=\boxed{-x^5+3x^2+3x+C}[/tex]
Whats a product with 2 consecutive digits
The two consecutive digits whose product is 132 are equals to 11 and 12.
Product of two consecutive digits = 132
Let us consider that the two consecutive digits are y and y+1.
Then we can write the expression as,
⇒y × ( y + 1 ) = 132
Expanding the left side of the expression, we get,
⇒ y² + y = 132
Rearranging the values and solving for y, we get,
⇒ y² + y - 132 = 0
Factorize this quadratic equation to get the value of y we have,
⇒ y² + 12y - 11y - 132 = 0
⇒ y( y + 12 ) -11 ( y + 12 ) = 0
⇒ ( y + 12)(y - 11) = 0
This implies,
The two possible values of y are -12 and 11.
However, choose the positive value of y .
Since we are dealing with digits.
Thus, y = 11, and the consecutive digits are 11 and 12.
Therefore, the two consecutive digits are 11 and 12, and their product is indeed 132.
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The given question is incomplete, I answer the question in general according to my knowledge:
The product of two consecutive digit is equal to 132 . What are the numbers?
An architect is designing a house. He wants the bedroom to have the dimensions of 9 ft by 5 ft by 7 ft. The architect doubles one dimension to create the den. Does that mean the den will have double the volume of the bedroom?
Answer:
Yes
Step-by-step explanation:
The definition of dimension is Length, Width, and Height so if he doubles the dimensions it will be double. The volume is 630.
pls hlp thx ur awesome
The value of k is 20.
Describe Equation?An equation is a mathematical statement that shows that two expressions are equal. It contains one or more variables and may involve arithmetic operations such as addition, subtraction, multiplication, division, or exponents. The goal of solving an equation is to determine the value of the variable that makes the equation true. Equations are commonly used in algebra and other mathematical fields to model real-world situations and solve problems. They can be written in various forms, including standard form, slope-intercept form, point-slope form, and general form, among others.
Since the sum of two angles on a straight line is always 180 degrees, we can set up an equation:
First angle + Second angle = 180
112 + 3k + 8 = 180
Simplifying the equation, we get:
3k + 120 = 180
Subtracting 120 from both sides, we get:
3k = 60
Dividing both sides by 3, we get:
k = 20
Therefore, the value of k is 20.
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I will mark brainliest!x
Answer:
a) m || n
b) p || q, and m must be perpendicular to both p and q.
c) p || q
d) p || q
e) m || n and p || q
in triangle abc, [am] is the median relative to [BC] and O is the midpoint of [AM] grade 8
BMED is a trapezoid and OD is equals to BD/2. Proof of these is given below.
How to explain the proofIt should be noted that to prove that BMED is a trapezoid, we need to show that either BM || ED or BM || DE. We will show that BM || DE.
Since O is the midpoint of AM, we have OA = OM, and thus triangle ODM is isosceles. Therefore, OD = DM.
Also, since E is the midpoint of DC, we have DE || AB (because AB is also a mid-segment of triangle ADC). Therefore, angle ADE = angle ABC.
Using the fact that angles in a triangle add up to 180 degrees, we have:
angle EDC + angle ADE + angle CED = 180 degrees
Substituting angle ADE = angle ABC, we get:
angle EDC + angle ABC + angle CED = 180 degrees
But angle CED = angle BCD (because they are alternate interior angles formed by transversal BD cutting parallel lines DC and AB). Therefore:
angle EDC + angle ABC + angle BCD = 180 degrees
This means that angles BCD, ABC, and EDC are all on the same line, and thus angle BCD + angle ABC = 180 degrees.
Now, using the fact that angles in a triangle add up to 180 degrees, we have:
angle BAC + angle ABC + angle ACB = 180 degrees
Substituting angle BCD + angle ABC = 180 degrees, we get:
angle BAC + angle BCD + angle ACB = 180 degrees
Since triangle BCD is isosceles (because BD is an angle bisector), we have angle BCD = angle CBD. Therefore:
angle BAC + angle CBD + angle ACB = 180 degrees
But angle ACD = angle ACB + angle CBD, so:
angle BAC + angle ACD = 180 degrees
This means that triangle ABC is similar to triangle ACD.
Now, since BM is a median of triangle ABC, we have:
BM = 1/2 AC
But triangle ADC is similar to triangle ABC, so:
AC = 2 AD
Therefore:
BM = AC/2 = AD
So we have BM || DE, and BM = DE, which means that BMED is a trapezoid.
2. To prove that D is the midpoint of AE, we will use the fact that BMED is a trapezoid. Since BM || DE, we have:
BD/DM = BE/EM
But DM = OD (since triangle ODM is isosceles) and EM = DC/2 = AC/4 (since E is the midpoint of DC and AC is a mid-segment of triangle ADC).
Therefore:
BD/OD = BE/(AC/4)
But we also have:
BE = BD + DE = BD + BM = 2BD
Substituting this into the previous equation, we get:
BD/OD = 2BD/(AC/4)
Simplifying:
BD/OD = 8BD/AC
This means that:
OD = AC/8
But we also know that AC = 2AD, so:
OD = AD/4
Since O is the midpoint of AM, we also have:
OD = OM = AM/2
Therefore:
AD/4 = AM/2
This means that:
AD = 2AM/4 = AM/2 = OD
So D is the midpoint of AE, and CD = 2AD.
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In a triangle ABC. [AM] is the median relative to [BC] and O is the midpoint of [AM]. (BO) cuts [AC] at D. Let E be the midpoint of [DC]. 1) Prove that BMED is a trapezoid. 2) Prove that D is the midpoint of [AE); deduce that CD = 2AD. 3) Prove that OD == BD.
If the reentry angle is 6.5°, what is x?
WORTH A LOt OF POINTS !!
Given the above conditions in the word problem above, x is also equal to 6.5°.
What is the explanation for the above response?
The angle x is the angle between this perpendicular line and the Earth's surface. It is also equal to the angle between the tangent line and the horizontal axis.
Since the reentry angle is 6.5°, we know that the tangent line makes an angle of 6.5° with the horizontal axis. We also know that the tangent line and the perpendicular line form a right angle, so the angle between the perpendicular line and the horizontal axis is 90° - 6.5° = 83.5°.
Finally, we can subtract this angle from 90° to find x:
x = 90° - 83.5° = 6.5°
Therefore, x is also equal to 6.5°.
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a company decides to keep a huge shipment of light bulbs if p<5% are defective otherwise they return the shipment. after running a test the company decides to keep the shipment and after all the bulbs where used it was found that less than 5% of the bulbs were defective. what type of error could have occurred?
The type of error that could have occurred in this scenario is a Type II error. A Type II error occurs when the null hypothesis is not rejected, even though it is false.
In this case, the null hypothesis is that the proportion of defective bulbs in the shipment is greater than or equal to 5%. By not rejecting this null hypothesis, the company is accepting the possibility that the shipment has a high proportion of defective bulbs, when in reality it does not. This can lead to significant costs for the company, such as the cost of returning the shipment or the cost of replacing defective bulbs in the future.
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A teacher was interested in the subject that students preferred in a particular school. He gathered data from a random sample of 100 students in the school and wanted to create an appropriate graphical representation for the data.
Which graphical representation would be best for his data?
Stem-and-leaf plot
Histogram
Circle graph
Box plot
The circle graph would be the best graphical representation for the given scenario as it effectively shows the proportion of students who preferred each subject.
Which graphical representation would be best for his data?For the given scenario where the teacher gathered data from a random sample of 100 students in a particular school and wants to represent the preferred subject of the students, the most appropriate graphical representation would be a circle graph or a pie chart.
A circle graph is a circular chart that is divided into sectors, where each sector represents a portion of the whole.
In this case, each sector can represent the percentage or number of students who preferred a particular subject. The circle graph is suitable when we want to show the proportion of different categories or data that add up to a whole.
On the other hand, a stem-and-leaf plot, histogram, and box plot are usually used to represent quantitative data, such as measures of central tendency (mean, median, mode), range, and distribution.
They are not ideal for categorical data like the preferred subject of students.
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Jacob is handing out fliers to advertise the next ASB meeting. He hands
out fliers to 5 people. Then, each of these 5 people hand out 5 fliers to 5
other people. If this goes on for 4 rounds, with each person that got
fliers in the pervious round handing out 5 flier to people in the next found,
How many people will have gotten fliers at that point including Jacob himself?
Answer: 5 (first round) + 25 (second round) + 125 (third round) + 625 (fourth round) = 780
So, at the end of 4 rounds, including Jacob himself, 780 people will have gotten fliers.
Step-by-step explanation: In the first round, Jacob hands out fliers to 5 people.
In the second round, each of the 5 people from the first round hands out 5 fliers to 5 other people. So, there are now 5 x 5 = 25 people with fliers (including the original 5).
In the third round, each of the 25 people from the second round hands out 5 fliers to 5 other people. So, there are now 25 x 5 = 125 people with fliers (including the original 5 and the 25 from the second round).
In the fourth round, each of the 125 people from the third round hands out 5 fliers to 5 other people. So, there are now 125 x 5 = 625 people with fliers (including the original 5, the 25 from the second round, and the 125 from the third round).
Lena, Alan, and Bill sent a total of 104 text messages over their cell phones during the weekend. Lena sent 8 fewer messages than Alan. Bill sent 2 times as many messages as Lena. How many messages did they each send?
So, Lena sent 24 messages, Alan sent 32 messages, and Bill sent 48 messages.
Let's denote the number of messages Lena, Alan, and Bill sent as L, A, and B, respectively. We are given the following information:
L + A + B = 104 (Total messages)
L = A - 8 (Lena sent 8 fewer messages than Alan)
B = 2L (Bill sent 2 times as many messages as Lena)
Now, we'll use the second equation to express A in terms of L:
A = L + 8
Next, substitute the expressions for A and B from equations 2 and 3 into equation 1:
L + (L + 8) + 2L = 104
Combine like terms:
4L + 8 = 104
Subtract 8 from both sides:
4L = 96
Divide by 4:
L = 24
Now that we have the number of messages Lena sent, we can find the number of messages Alan and Bill sent:
A = L + 8 = 24 + 8 = 32
B = 2L = 2 * 24 = 48
I'm confused I need to solve for "C" but I can't figure this out
Answer:
c = 56°
Step-by-step explanation:
the exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
120° is an exterior angle of the triangle , then
c + 64° = 120° ( subtract 64° from both sides )
c = 56°
12 If the domain of the function f(x) = 2X²-8 is {- 2, 3, 5}, then
the range is
(1) {-16, 4, 92}
(2) {-16, 10, 42}
(3) {0, 10, 42}
(4) {0, 4, 92}
when we have data with two quantitative variables, x and y. suppose the general trend changes direction (for example, increases and then decreases). suppose we would like to determine if there is a relationship between x and y, and if so, we wish to create a model that allows us to predict the expected value of y based on x. what is a good method to use?
Once you have information with two quantitative factors, x, and y, and you watch a common slant that changes heading, one good method to decide in case there's a relationship between x and y and to form a show that permits you to anticipate the anticipated esteem of y based on x is to utilize polynomial regression.
Polynomial relapse may be a sort of relapse investigation in which the relationship between the free variable (x) and the dependent variable (y) is modeled as an nth-degree polynomial. By fitting a polynomial work to the information, you'll be able to capture the common drift of the information even if it changes course and utilizes it. to foresee the anticipated esteem of y based on a given esteem of x.
polynomial relapse can be a valuable method to analyze and show information with a changing drift and give experiences into the relationship between x and y.
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s^2-11s
Find the solution set for this equation and separate the two values with a comma
The solution set for this equation S^2-11s can be expressed as 0, 11.
How can the values for the equation be determined?An equation is a mathematical statement that shows that two expressions are equal. It consists of two sides, a left-hand side (LHS) and a right-hand side (RHS), separated by an equal sign (=). The LHS and RHS can contain variables, constants, and mathematical operations such as addition, subtraction, multiplication, division, exponentiation, and so on. The purpose of an equation is to find the value(s) of the variable(s) that make the equation true.
Given that S^2-11s, which can be written as S^2-11s = 0 We can factor the expression on the left-hand side to get:
S(S-11) = 0
Then this equation is satisfied when either S = 0 or S-11 = 0. Thus, the solution set is: S = {0, 11}
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a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 200 and a standard deviation of 50. find , the score which separates the lower 60% from the top 40%.
A bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 200 and a standard deviation of 50.
We will find the score that separates the lower 60% of ratings from the top 40% of ratings.
Let x be the score that separates these two portions. We can find the corresponding z-scores using the standard normal distribution, since the ratings are normally distributed with mean 200 and standard deviation 50.
The z-score corresponding to the 60th percentile is the value z such that
P(Z ≤ z) = 0.6
With the help of standard normal tables, we can find that z = 0.25. Therefore, we have
(x - 200)/50 = 0.25
For x, we get
x - 200 = 0.25 * 50
x - 200 = 12.5
x = 212.5
Similarly, the z-score corresponding to the 40th percentile is the value z such that
P(Z ≤ z) = 0.4
With the help of standard normal tables, we can find that z = -0.25. Therefore, we have
(x - 200)/50 = -0.25
For x, we get
x - 200 = -0.25 * 50
x - 200 = -12.5
x = 187.5
Hence, the score that separates the lower 60% from the top 40% is between 187.5 and 212.5.
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