The sketch of the graph of y = 1/f(x) is added as an attachment
Sketching the graph of y = 1/f(x)To find the function equation, we need to determine the factors of the equation based on the zeros of the function.
Since the zeros of the function are at x = -5, -1, and 4, the factors of the equation will be:
(x + 5), (x + 1), and (x - 4)
Multiplying these factors together gives us:
f(x) = a(x + 5)(x + 1)(x - 4)
To find the value of the constant term a, we can use the fact that the graph passes through the point (0, -4):
-4 = a(0 + 5)(0 + 1)(0 - 4)
-4 = -20a
So, we have
a = 1/5
Therefore, the function equation is:
f(x) = 1/5(x + 5)(x + 1)(x - 4)
For the graph of y = 1/f(x), we have
y = 5/[(x + 5)(x + 1)(x - 4)]
See attachment for the graph
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What is 25% of 32?
Hint: We can think of 25% as a common
fraction.
Answer:8%
Step-by-step explanation:
you divide 25 by 32 and round to nearest tenth
hope this helps :)
you are renting a condominium at 1,700 a month. Your annual expenses are insurance, $325; lost interest, $50 and utility bills, $5,940. You also pay a monthly fee for all maintenance and what is his average monthly expense?
Answer:
$526.25, and your total monthly expense (including rent and maintenance fee) is $2,326.25.
Step-by-step explanation:
To calculate your average monthly expense, we need to first add up all of your annual expenses and divide by 12 (the number of months in a year) to find the monthly average.
Annual expenses:
Insurance: $325
Lost interest: $50
Utility bills: $5,940
Total annual expenses = $325 + $50 + $5,940 = $6,315
To find the average monthly expense, we divide the total annual expenses by 12:
Average monthly expense = Total annual expenses / 12
Average monthly expense = $6,315 / 12
Average monthly expense = $526.25
In addition to the annual expenses, you also pay a monthly rent of $1,700 and a monthly fee for all maintenance. Let's assume that the monthly maintenance fee is $100.
Therefore, your total monthly expense would be:
Total monthly expense = Monthly rent + Monthly maintenance fee + Average monthly expenses
Total monthly expense = $1,700 + $100 + $526.25
Total monthly expense = $2,326.25
So, your average monthly expense is $526.25, and your total monthly expense (including rent and maintenance fee) is $2,326.25.
Is a triangle with sides of 5 meters, 12 meters, and 13 meters a right triangle? Explain/Show your work.
Answer:
yes it is if you bisect 5m on a 12m line
θ=1 rad when S=r. If θ=2 rad then what is the condition? :::::::(S means arc length)
If θ=2 rad then the condition when θ=2 rad is that the arc length S is equal to twice the radius r.
In this problem, we are given that when the arc length is equal to the radius (S=r), the angle is 1 radian (θ = 1 rad). Now, we are asked to find the condition when the angle is 2 radians (θ = 2 rad).
If Θ=1 rad when S=r, it means that when the angle subtended by an arc of length r is 1 radian, then the radius of the circle is also r.
Now, if θ=2 rad, we can use the same proportionality to find the arc length S that corresponds to this angle. Since the angle has doubled, we can expect the arc length to double as well. Therefore, we have:
θ/Θ = S/r
2/1 = S/r
S = 2r
Thus, the condition when θ=2 rad is that the arc length S is equal to twice the radius r.
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a circle has a circumerence of 6 and an arc with a 60 degree central angle. what is the length of the arc
The length of the arc is 1 unit.
What is length of an arc?The distance that runs through the curved line of the circle making up the arc is known as the arc length.
length of an arc is expressed as;
l = tetha/360 ×2πr
the circumference of circle is expressed as ;
C = 2πr
6 = 2×3.14 × r
r = 6/6.28
r = 0.955 units
Therefore length of the arc
= 60/360 × 6
since 2πr is the circumference,
l = 360/360 = 1 unit
therefore the length of the arc is 1 unit.
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What is the area of a circle with diameter of 16 meters? Leave the answer in terms of pi
Answer:
64π
Step-by-step explanation:
Use the formula for an area of a circle
[tex]A = \pi r^2[/tex]
Half of 16 is 8.
8*8 = 64.
The area of a circle with a diameter of 16 meters is equal to 64π or 200.96 square meters.
How to calculate the area of a circle?Mathematically, the area of a circle can be calculated by using this formula:
[tex]\text{Area} = \pi \text{r}^2[/tex]
Where:
[tex]\text{r}[/tex] represents the radius of a circle.
[tex]\text{Note:} \ \text{Radius} = \dfrac{\text{diameter}}{2} = \dfrac{16}{2} = 8 \ \text{meters}.[/tex]
By substituting the radius into the formula for the area of a circle, we have the following;
[tex]\text{Area of circle} = \pi \times 8^2[/tex]
[tex]\bold{Area} \ \text{of circle} = 64\pi \ \text{or} \ 200.96[/tex] square meters.
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Consider the graph of f(x) = (1/2)^x
Each graph shows the result of a transformation applied to function f where f(x) = (1/2)^x
1) The graph of function g is graph W because it is result of a vertivcal compression applied to graph f.
2) The graph of function g is graph X because it is result of a horizontal shift applied to graph f.
3) The graph of function g is graph Y because it is result of a reflection over y-axis applied to graph f.
4) The graph of function g is graph Z because it is result of a horizontal compression applied to graph f.
Here, a transformation applied to function f where f(x) = (1/2)^x
Consider graph W. We can observe that when the the graph of f(x) is compressed vertically then it will results in the graph of g(x)
Consider graph X. We can observe that if the the graph of f(x) is shifted horizontally right by 2 units then it will results in the graph of g(x)
Consider graph Y. We can observe that the the graph of g(x) is nothing but the reflection of f(x) over x-axis.
Consider graph Z. We can observe that when the the graph of f(x) is compressed horizontally then it will results in the graph of g(x)
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Angulo de 38 grados y 25 grados
I need help with this math
A right triangular pyramid has a height of 14 yards. Its base has a leg that is 8 yd. The volume of the pyramid is 168 cubic yd. The other leg of the base is ___ yd.
Therefore , the solution of the given problem of volume comes out to be the other leg of the right triangular pyramid's base is 3 yards long.
What does volume actually mean?A three-dimensional object's volume, which is expressed in cubic units, indicates how much space it takes up. The indications for cubic measurements are litre and in3. However, you have to be cognizant of an object's volume in order to calculate its dimensions. Converting an object's weight into metric units like iii . and kilogrammes is a standard technique.
Here,
Let's use "x" yards to represent the other leg of the right triangle pyramid's base.
A pyramid's volume can be calculated using the following equation: => Volume = (1/3) * Base Area * Height
In this instance, we are informed that the pyramid has a volume of 168 cubic yards and a height of 14 yards.
=> 168 = (1/3) * 14 * base area
The base area can be estimated as (8 * x)/2 = 4x because we know that one leg of the base is 8 yards long and the other leg is designated as "x" yards.
=> 168 = (1/3) * 4x * 14
=> 168 = (4/3)x * 14
=> 168 = (4/3) * 14x
=> 168 = 56x
=> x = 168/56
=> x = 3
Therefore, the other leg of the right triangular pyramid's base is 3 yards long.
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A theatre contains 457 seats and the ticket prices for a recent play were $54 for adults and $17 for children. If the total proceeds were $14,984 for a sold-out matinee, how many of each type of ticket were sold?
Answer: 195 adult tickets and 262 children tickets
Step-by-step explanation:
Let a be adult tickets and c be children tickets.
We know there are 457 seats.
a + c = 457
We also know the cost of the tickets and how much money was made.
$54a + $17c = $14,984
Now, we have a system of equations we can use to solve.
a + c = 457
$54a + $17c = $14,984
Lastly, we will graph this system, see attached. The point of intersection, or where the lines intersect, is our answer.
195 adult tickets and 262 children tickets.
Answer:
Chidden tickets were 262 and adult tickets were 195 tickets
Step-by-step explanation:
Let x = the number of children tickets
Let y = the number of adult tickets.
x + y = 457
17x + 54y = 14984
Use substitution
x + y = 457 Solve for y
y = 457 -x Substitute 457 -x for y in the equation 17x + 54y = 14984
17x + 54y = 14984
17x + 54(457 -x) = 14984 Solve for x Distributer the 54
17x + 24678 - 54x = 14984 Combine like terms
-37x = -9694 Divide both sides by -37
x = 262
The number of children tickets.
x + y = 457 Substitute 262 for x and solve for y
262 + y = 457 Subtract 262 from both sides
y = 195
The number of adult tickets.
Helping in the name of Jesus.
4 ft
6 ft
T4ft-
8 ft
1. List the shapes that make up the front of the house.
The answer on shape of house is , (1) A rectangle for the main structure of the house. (2) A triangle for the roof. (3) A rectangle for the front porch. (4) Two trapezoids for the roof of the front porch. (5) A rectangular door.
What is Trapezoid?A trapezoid is a four-sided geometric shape with two parallel sides, called the bases, that are of different lengths, and two non-parallel sides that connect the bases. The non-parallel sides are also called legs, and they may or may not be equal in length.
Trapezoids are often encountered in geometry and in real-life situations, such as in construction and architecture. They can be classified as either right trapezoids or oblique trapezoids depending on whether one of the angles formed by the bases and a leg is a right angle or not.
Based on the image provided, the shapes that make up the front of the house are:
A rectangle for the main structure of the house. A triangle for the roof.A rectangle for the front porch.Two trapezoids for the roof of the front porch.A rectangular door.To know more about Oblique trapezoids visit:
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How many times does 13 go into 26
Answer: 2
Step-by-step explanation:
In ΔFGH, f= 67 inches, m∠G=66° and m∠H=30°. Find the length of g to the nearest inch
Answer:
38 inches
Step-by-step explanation:
We can use the Law of Sines to solve for the length of side g:
sin(66°)/67 = sin(30°)/g
Cross-multiplying, we get:
g*sin(66°) = 67*sin(30°)
Dividing both sides by sin(66°), we get:
g = 67*sin(30°)/sin(66°) ≈ 38 inches (rounded to the nearest inch)
Therefore, the length of side g is approximately 38 inches.
what fraction is equivelent to - (7/8)
Answer: The negative sign in front of 7/8 indicates that the fraction is negative. To find an equivalent fraction, we can keep the same value but change the sign. Therefore, an equivalent fraction that is positive would be (-(7/8)) = (-7)/8.
Step-by-step explanation:
What is the solution of the equation (x-5)2 + 3(x-5)+9=0? Use u substitution and the quadratic formula to solve.
-3±3-√3
2
O x-
7±3-√√3
2
Ox-2
Ox=8
Answer: there is no solution
Step-by-step explanation:
The solution of the equation is [tex]x=\frac{-7 \pm 3\sqrt{3}i} {2}[/tex]
What is a quadratic equation?Quadratics can be defined as a polynomial equation of a second degree, which implies that it comprises a minimum of one term that is squared. It is also called quadratic equations.
The general form of the quadratic equation is: ax² + bx + c = 0
Given that, a quadratic equation (x-5)² + 3(x-5) + 9 = 0, we need to solve it,
So, put x-5 = u
Therefore,
u² + 3u + 9 = 0
Solving using quadratic formula,
[tex]x=\frac{-b \pm \sqrt{b^2-4ac}} {2a}[/tex]
Here a = 1, b = 3 and c = 9
Therefore,
[tex]u=\frac{-3 \pm \sqrt{3^2-4(9)}} {2}[/tex]
[tex]u=\frac{-3 \pm \sqrt{9-36}} {2}[/tex]
[tex]u=\frac{-3 \pm \sqrt{-27}} {2}[/tex]
[tex]u=\frac{-3 \pm 3\sqrt{3}i} {2}[/tex]
Put u = x-5,
Therefore,
[tex]x-5=\frac{-3 \pm 3\sqrt{3}i} {2}[/tex]
[tex]x=\frac{-7 \pm 3\sqrt{3}i} {2}[/tex]
Hence, the solution of the equation is [tex]x=\frac{-7 \pm 3\sqrt{3}i} {2}[/tex]
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An area of land measures 735 metres by 756 metres. It is to be divided up into
square plots of equal size.
(a) What is the area of the largest squares that will fit on it?
(b) How many squares will fit on it?
Answer:
See below!
Step-by-step explanation:
Given:Length = 735 meters
Width = 756 meters
Finding the area:Area = length × width
Area = 735 × 756
Area = 555660 m²
Part a)To find the area of largest square, we first need to find the highest common factor of 735 and 756.
HCF of 735 and 756:
= 21
This means the length of largest square will be 21 m.
Now,
Area of largest square:= length × length
= 21 × 21
= 441 m²Part b)No. of squares = Total area / Area of largest square
No. of squares = 555660 / 441
No. of squares = 1260 squares[tex]\rule[225]{225}{2}[/tex]
Calcular el área de un triángulo equilátero si su base es de 8 m y una altura de 5 m
Answer:
[tex]tringle = \frac{1}{2} \times base \times hieght[/tex]
1/2 × 8×5
0.5×40
=20m
Find the volume of a tissue box that has the following dimensions:
Length=20 cm
Width= 5 cm
Height= 12 cm
Volume=______
Answer:
1,200
Step-by-step explanation:
The formula is Length x Width x Height so it will be 20 x 5 x 12 and you get 1,200.
Hope this helps!
HELPP SOMEONE PLEASE
Answer:
8. mArc ED = 38°
9. mArc EA = 142°
10.mArc BDC = 308°
Step-by-step explanation:
The measure of an a central angle and it's intercepted arc are equal
So if the measure of the angle for the angle that intercepts Arc ED is 38° the arc is also 38°
Same thing with Arc EA, the central angle that intercepts it is 142° so the measure of Arc EA is 142°
Arc BDC is a major arc so it is greater than 180°. It goes around the circle from point B to point C and point D is one of the points on the arc.
We could find the value of the arc two ways. We could add all the angles the that make up the central angle it is intercept by or we could simply subtract the 52° that isn'tt a part of the arc and subtract that from 360°
360 - 52 = 308
So the central angle intercepting Arc BDC is 308° so the arc also has a measure of 308°.
I'm having a hard time finding the period, amplitude, and sinusoidal equation of this graph. I don't know if I'm supposed to use sine or cos. Please help me
The period of the sinusoidal equation of the graph is 4 months.
The amplitude of the sinusoidal equation of the graph is 84 degrees Celsius.
What is the period and amplitude of a wave?The period and amplitude are two important characteristics of a wave.
Period: The period of a wave is the time it takes for one complete cycle of the wave to occur. The period of a wave determines its frequency, which is defined as the reciprocal of the period.
Amplitude: The amplitude of a wave is the maximum displacement of the wave from its equilibrium position. In simpler terms, it represents the height or strength of the wave.
In then given graph, the period of the wave = 1 complete cycle in 4 months = 4 months/cycle = 4 months
Amplitude = 84 degrees Celsius.
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6/5/8 - 2/3/8 estimate
The estimated value of the expression [tex]6/5/8 - 2/3/8[/tex] is approximately [tex]0.5082[/tex].
How can we calculate the multiple fraction?In Mathematics, fractions are defined as the parts of a whole. The whole can be an object or a group of objects
To estimate 6/5/8 - 2/3/8, we can convert the fractions to decimals and then perform the subtraction.
6/5/8 is equivalent to 6 ÷ 5.8, which is approximately 1.0345. 2/3/8 is equivalent to 2 ÷ 3.8, which is approximately 0.5263.
Therefore, 6/5/8 - 2/3/8 is approximately 1.0345 - 0.5263 = 0.5082.
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Match the equation or expression to the number of terms, the coefficients and the constants.
[tex]1.[/tex] The answers are given below
Equation: [tex]6xt +4yz -3 +10a = 1[/tex]
Number of terms: [tex]4[/tex]
Coefficients: [tex]6,4,10[/tex]
Constants: [tex]-3,1[/tex]
[tex]2.[/tex] Expression: [tex]25abc -2b +3ac -6bc +25[/tex]
Number of terms: [tex]5[/tex]
Coefficients: [tex]25,-2,3,-6[/tex]
Constants: [tex]25[/tex]
[tex]3.[/tex] Equation: [tex]25y -3xy+5x = 100[/tex]
Number of terms: [tex]3[/tex]
Coefficients: [tex]25,-3,5[/tex]
Constants: [tex]100[/tex]
How to break down mid point?To break down each equation or expression and identify the number of terms, coefficients, and constants.
[tex]1.[/tex] Equation: [tex]6xt +4yz -3 +10a = 1[/tex]
Number of terms: 4. There are four terms in this equation separated by addition and subtraction operators.
Coefficients: [tex]6,4,10[/tex]. These are the coefficients, which are the numerical values multiplied by the variables (xt, yz, a) in each term.
Constants: [tex]-3,1[/tex]. These are the constants, which are the numerical values without any variables that are added or subtracted in the equation.
[tex]2.[/tex] Expression:[tex]25abc -2b +3ac -6bc +25[/tex]
Number of terms: [tex]5[/tex] There are five terms in this expression separated by addition and subtraction operators.
Coefficients: [tex]25,-2,3,-6[/tex]. These are the coefficients, which are the numerical values multiplied by the variables (abc, b, ac, bc) in each term.
Constants: [tex]25[/tex]. This is the constant, which is the numerical value without any variables that is added in the expression.
[tex]3.[/tex] Equation: [tex]25y -3xy+5x = 100[/tex]
Number of terms:[tex]3[/tex]. There are three terms in this equation separated by addition and subtraction operators.
Coefficients: [tex]25,-3,5[/tex]. These are the coefficients, which are the numerical values multiplied by the variables (y, xy, x) in each term.
Constants: [tex]100[/tex]. This is the constant, which is the numerical value without any variables on the right-hand side of the equation.
Therefore, [tex]1.[/tex] The answers are given below
Equation: [tex]6xt +4yz -3 +10a = 1[/tex]
Number of terms: [tex]4[/tex]
Coefficients: [tex]6,4,10[/tex]
Constants: [tex]-3,1[/tex]
[tex]2.[/tex] Expression: [tex]25abc -2b +3ac -6bc +25[/tex]
Number of terms: [tex]5[/tex]
Coefficients: [tex]25,-2,3,-6[/tex]
Constants: [tex]25[/tex]
[tex]3.[/tex] Equation: [tex]25y -3xy+5x = 100[/tex]
Number of terms: [tex]3[/tex]
Coefficients: [tex]25,-3,5[/tex]
Constants: [tex]100[/tex]
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Laurel's W-2 form reported total Medicare wages as $100,750. She contributed $30 per weekly paycheck to her FSA and $75 per weekly paycheck to her retirement plan. She received a 1099 form from her bank for her savings account interest in the amount of $690 and a 1099 form from an employer that she did some consulting work for in the amount of $2,600. What is Laurel's taxable income?
If Laurel received a 1099 form from her bank for her savings account interest in the amount of $690 and a 1099 form from an employer that she did some consulting work for in the amount of $2,600, then Laurel's taxable income is calculated as $98,580.
What is taxable income?Taxable income refers to the base upon which an income tax system imposes tax.
We deduct the following;
Wages reported on W-2 = $100,750
Interest income reported on 1099= $690
Consulting income reported on 1099= $2,600
Therefore, her total income = $100,750 + $690 + $2,600 = $104,040
Laurel's allowable deductions include:
FSA contributions: $30 per week x 52 weeks = $1,560
Retirement plan contributions: $75 per week x 52 weeks = $3,900
Total deductions = $1,560 + $3,900 = $5,460
Laurel's taxable income is found as
= Total income - Total deductions
= $104,040 - $5,460
= $98,580
In conclusion, Laurel's taxable income is $98,580.
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< ^2 − 3
^2 ≥ x^2/2 -12
Is this a system of linear inequalities?
The linear inequalities in the given graph is y ≥ x/2 -1 and y< -1/2x -3.
What is Linear inequalities ?Linear inequalities are the expressions where any two values are compared by the inequality symbols such as, ‘<’, ‘>’, ‘≤’ or ‘≥’. These quantities may be numerical, algebraic, or a combination of the two.
Here, we have,
The symbols "" and ">" signify tight inequalities, while "" and "" signify slack inequalities. A linear inequality has the same appearance as a linear equation, but uses a different symbol to link the two expressions.
we have,
In the given graph, the area above solid line,
points, (-2 , -2) , (0 , -1)
slope = 1/2
so, y ≥ x/2 -1
The area below dashed line ,
points, (-2 ,-2) , (0 ,-3)
slope= -1/2
so, y< -1/2x -3.
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1. Which number is the greatest? 20 -100 -45 50
Answer:
D) 50
Step-by-step explanation:
-100 <-45 < 20 < 50
Answer:
50
Step-by-step explanation:
any numbers approaching negative (before 0) in an increasing manner are the lowest, whereas numbers approaching positive in a increasing manner are the greatest.
pls!! :(( a golf ball has been hit off of the tee at an angle of elevation of 30 degrees and an initial velocity of 128 ft/sec
how long is the ball in the air (hang time)?
what is the maximum height of the ball?
how far, horizontally, does the ball travel in the air?
According to the information, the horizontal distance traveled by the ball is 443.404 feet.
How to calculate the distance traveled by the ball?We can use the kinematic equations of motion to solve for the hang time, maximum height, and horizontal distance traveled by the golf ball.
First, we need to resolve the initial velocity vector into its horizontal and vertical components. The vertical component will determine the maximum height and hang time, while the horizontal component will determine the horizontal distance traveled.
The initial velocity can be represented as:
v0x = v0 cos(theta) = 128 cos(30) = 110.851 ft/secv0y = v0 sin(theta) = 128 sin(30) = 64 ft/secwhere v0 is the initial velocity, theta is the angle of elevation, v0x is the horizontal component of the initial velocity, and v0y is the vertical component of the initial velocity.
Now we can use the kinematic equations to solve for the hang time, maximum height, and horizontal distance traveled.
Hang time (time in air):
We can use the vertical motion equation to solve for the time when the ball reaches its maximum height:
v = v0y - gt0 = 64 - 32tt = 2 secondsSince the ball will be in the air for twice the time it takes to reach its maximum height, the hang time is:
2t = 4 secondsMaximum height:
We can use the vertical motion equation to solve for the maximum height reached by the ball:
y = v0y t - 1/2 gt^2y = 64(2) - 1/2 (32)(2)^2y = 64 ftTherefore, the maximum height of the ball is 64 feet.
Horizontal distance traveled:
We can use the horizontal motion equation to solve for the horizontal distance traveled by the ball:
x = v0x t
x = 110.851(4)
x = 443.404 ft
Therefore, the horizontal distance traveled by the ball is 443.404 feet.
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What is the image of the point (-1, 2) after a rotation of 270° counterclockwise about the origin?
The image of the point (-1, 2) after a rotation of 270° counterclockwise about the origin is (2, 1).
What is the image of the point?To rotate a point counterclockwise about the origin, we can use the following formulas:
(x', y') = (y,-x)
where (x, y) are the coordinates of the original point, (x', y') are the coordinates of the rotated point
In this case, we want to rotate the point (-1, 2) by 270° counterclockwise about the origin.
So, we have
(x', y') = (2,1)
Therefore, the image of the point (-1, 2) after a rotation of 270° counterclockwise about the origin is (2, 1).
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At the school's holiday craft fair, Colette and her classmates get to make gingerbread houses. Their teacher divides a bag of licorice ropes evenly among the 9 students at the table. Each student gets 3 licorice ropes to decorate the roof of his or her gingerbread house.
Answer: So, what are you asking?
Step-by-step explanation:
The temperatures, in degrees F, at 7:00 a.m. for five days during one week are shown.
-3, 4, -1, 6, 7
The mean temperature for all 7 days of the week was 0°F.
What was the mean of the temperatures for the two missing days?
a. -13
b. -10.5
c. -6.5
d. 0
The value of the mean of the temperatures for the two missing days are,
= - 6.5
We have to given that;
The temperatures, in degrees F, at 7:00 a.m. for five days during one week are shown.
-3, 4, -1, 6, 7
And, The mean temperature for all 7 days of the week was 0°F.
Now, We can assume that,
Last two days temp. are x and y.
Hence, We get;
(- 3 + 4 + (-1) + 6 + 7 + x + y) / 7 = 0
- 3 + 4 - 1 + 6 + 7 + x + y = 0
x + y = - 13
Divide both side by 2;
(x + y)/2 = - 13/2
(x + y)/2 = - 6.5
Thus, The value of the mean of the temperatures for the two missing days are,
= - 6.5
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r=−5sinθ+4θ
Which of the following types of symmetry is demonstrated in the equation above based on the three symmetry tests for polar equations?
θ=π/2
polar axis
pole
none
Answer: Correct answer is pie/2 or A
Step-by-step explanation:
r = -5sinθ + 4θ has symmetry with respect to the line θ = π/2.
To demonstrate this, we can apply the third symmetry test for polar equations:
Symmetry with respect to the line θ = π/2: Replace θ by π - θ and see if the equation remains the same. If it does, the equation has symmetry with respect to the line θ = π/2.
r = -5sin(π/2 - θ) + 4(π/2 - θ) = 5cosθ + 2π - 4θ
r = 5cosθ + 2π - 4θ is the same as the original equation, so there is symmetry with respect to the line θ = π/2.
Therefore, the correct answer is θ = π/2.