If y varies inversely with the square of r, what is the constant of proportionality when y - 10 and 1 = 5?

Answers

Answer 1

Question:

If y varies inversely with the square of r, what is the constant of proportionality when y =10 and r = 5?

Answer:

The constant of proportionality is 250

Solution:

Given that,

y varies inversely with the square of r

Which means,

[tex]y \propto \frac{1}{r^2}\\\\y = k \times \frac{1}{r^2}[/tex]

Where, "k" is constant of proportionality

Subtitute y = 10 and r = 5

[tex]10 = k \times \frac{1}{5^2}\\\\10 = k \times \frac{1}{25}\\\\k = 10 \times 25\\\\k = 250[/tex]

Thus the constant of proportionality is 250


Related Questions

The sum of two numbers is 51 and the difference is 17. What are the numbers?

Answers

Answer: The answer is 34 and 17

Step-by-step explanation: 34+17= 51

and 34-17=17

A large candy bar was 127 calories. The smaller
candy bar has 25 percent less calories. How many
calories does the smaller candy bar have?​

Answers

Answer:

95.25 calories

Step-by-step explanation:

127  x 0.25 = 31.75

127 -31.75 = 95.25

     

6r3s–12r3–10r2s+20r2

Answers

Answer:

2(s+10r)

Step-by-step explanation:

Write expression in simplest form (-11/2x+3)-2(-11/4x-5/2)=

Answers

Answer:

8

Step-by-step explanation:

-11/2x + 3 -2(-11/4x -5/2)

-11/2x + 3 + 11/2x + 5        use the distributive property

-11/2x  + 11/2x + 8        combine 3 and 5

8          subtract the x

the answer is 8

The sum of three consecutive integers is -234 find the integers​

Answers

Answer:

-77, -78, -79

Step-by-step explanation:

let one of the integers be x

since the integers are consecutive, the other 2 integers must be

(x+1) and (x+2)

given that sum of the integers is -234,

x + (x+1) + (x+2) = -234

x + x + 1 + x + 2 = -234

3x + 3 = -234   (subtract 3 from both sides)

3x = -234-3

3x = -237  (divide both sides by 3)

x = -237 / 3

x = -79  (answer)

hence the other two numbers are

(x + 1) = -79 + 1 = -78 (answer)

and

(x+2) = -79 + 2 = -77 (answer)

Answer:

Step-by-step explanation:

let the first integer is 'x', and by adding 1 in it we get the second integer that is 'x+1', and for third integer we need to add 1 in the previous integer i.e. is 'x+1' we get 'x+2'. Now all three integers we have are

x,x+1 and x+2.

since sum or add all three integer we get -234. so

x+x+1+x+2=-234

x+x+x=3x, and 1+2=3

3x+3=-234

3x=-234-3

3x=-237

x=-237/3

now the first integer is -237/3 or -79,

second integer is -78 and third integer is -77.

for verification add all three to get -234.

-79-78-77=-234. hence proved.

What is the area of this figure?

Answers

Problem setup:

The shape is way too complicated by itself, so I cut the shape into 5 different parts.

Please refer to the attached image or my answer will not make much sense.

Shape 1:

This is a triangle. The base is 3 and the height is 2. Thus, the area is:

[tex]A=\dfrac{1}{2}*3*2[/tex]

[tex]=3[/tex]

Shape 1 has an area of 3 square units.

Shape 2:

This shape is also a triangle. The base is 4 and the height is 2. Thus, the area is:

[tex]A=\dfrac{1}{2}*4*2[/tex]

[tex]=4[/tex]

Shape 2 has an area of 4 square units.

Shape 3:

This a unit square (the side lengths are 1).

Thus, Shape 3 has an area of 1 square unit.

Shape 4:

This shape is a rectangle. The base is 3 and the height is 4. Thus, the area is:

[tex]A=3*4[/tex]

[tex]=12[/tex]

Shape 4 has an area of 12 square units.

Shape 5:

This shape is also a rectangle. The base is 4 and the height is 2. Thus, the area is:

[tex]A=4*2[/tex]

[tex]=8[/tex]

Shape 5 has an area of 8 square units.

Total shape:

Add the areas of all 5 shapes to find the area of the shaded figure.

[tex]A=3+4+1+12+8[/tex]

[tex]=26[/tex]

The figure has a total area of 26 square units.

Side notes:

There is a way to solve this problem by only dividing this into only 3 different shapes, can you figure it out?

Let me know if you need a hint or any clarifications, thanks!

~ Padoru

What is 0.31111... as a fraction

Answers

answer: 14/45
explanation:

Answer:

14/45

Step-by-step explanation:

you want to leave a person a 25% tip. But how much of a tip would you leave her if your meal was $38.47

Answers

Answer:$48.09 please give brainliest!

Step-by-step explanation: you need to turn the percent to decimal so you move the decimal points to places to the right so the percent now is 0.25 so then you do 38.47 *0.25 =9.62 so then you add 9.62 +38.47 =48.09

Answer:

$9.62

Step-by-step explanation:

total cost= $38.47

tip            = 25% = [tex]\frac{25}{100}[/tex]

=> tip       = [tex]\frac{25}{100}[/tex] * $38.47

               ≈ $9.62 (to the nearest cent)

NOTE: the question is solely asking for the tip, therefore, there is no need to add the tip to the total.

Hope this helps :)

Find the slope of the line that contains the points (1,-1) and (-2,8)

Answers

The formula for slope is (y-y1)/(x-x1).
1 = x
-1 = y
-2 = x2
8 = y2

You would plug those into the formula: (-1-(-2))/(-1-8) and that would equal to: 1/(-9).

The slope of the line that contains the points (1,-1) and (-2,8) is calculated using the change in y-values over the change in x-values, which results in a slope of -3.

To find the slope of the line that contains the points (1,-1) and (-2,8), we use the formula:

slope (m) = (Change in y) / (Change in x) = (y2 - y1) / (x2 - x1)

Substitute the given points into the formula:

m = (8 - (-1)) / (-2 - 1)
= (8 + 1) / (-2 - 1)
= 9 / (-3)
= -3

So, the slope of the line is -3.

PLEASE HELP - Part A Find the value of x in the following figure: Part B Find the measure of ACD

Answers

Answer:

Part A = 90

Part B = 145

Step-by-step explanation:

For part A, we know that a triangle has a sum of 180 degrees. So we just add the angles we already know and then subtract them from 180. For part B, we know that angle ACB and angle ACD are supplementary angles, meaning they add up to 180 degrees. So just take 180 and subtract 35 to find the measure of angle ACD.

Simplify the following expression.
2x^5+ 3x^3 - 5x^2 + x^2 +7x+1+7x^5 - 3x^3 - 4

Answers

9x^5-4x^2+7x-3 is the simplified version of your answer.

If 12 and 20 each divide K without a remainder, what is the value of K?

Answers

Factors of 12 : 1, 2, 3, 4, 6, 12

Factors of 20: 1, 2, 4, 5, 10, 20

In both lists of factors, 4 is in common. Therefore, the value of K is 4 because it can divide into both 12 and 20 without a remainder. 2 is also another possible value of K.

Answer:

4

Step-by-step explanation:

1*12=12   1*20=20

2*6=12   2*10=20

3*4=12   4*5=20

both have a similar multiple of 4, so k must be 4.

Chuck mallory makes a deposit at an atm and walks away with $50.00 in cash and the receipt for the $538.00 total deposit he made. He remembers that the checks deposited totaled twice the currency he deposited. He did not deposit any coins. How much In currency did he deposit ? How much in checks did he deposit ?

Answers

Final answer:

Chuck Mallory deposited $179.33 in currency and $358.66 in checks at an ATM. This total transaction totaled $538.00.

Explanation:

The question references a deposit made at an ATM. We'll analyze this transaction with the given facts.

Chuck deposited a total of $538.00 He left the bank with $50.00 in cash The total deposit is composed of checks and currency The checks deposited were twice the amount of currency deposited

Let's declare two variables to solve this problem. Let C represent the Currency and Ch represent the Checks. Based on the facts, we can establish the following equations:

C + Ch = $538 Ch = 2C

We can solve for C by replacing Ch in the first equation with 2C from the second equation. Doing this, we get C + 2C = $538, or 3C = $538.

By dividing both sides of the equation by 3, We get C = $179.33. He deposited $179.33 in currency.

We can then find how much in checks he deposited by substituting C=$179.33 in the second equation. Ch = 2* $179.33, so Ch = $358.66. He deposited $358.66 in checks.

Learn more about Currency and Checks Deposits here:

https://brainly.com/question/15867820

#SPJ12

The sum of two numbers is 98. If four times the smaller number is subtracted from the larger number, the result is 18. Find the two numbers,
The larger number is
The smaller number is

Answers

Hey there!

Let's make a system of equations using x and y to find the two numbers.X is smaller and y will be larger.

x+y=98

y-4x=18

Now, let's solve the bottom equation for y so we can use substitution.

y=18+4x

Now we plug this into the first equation.

x+18+4x=98

5x+18=98

5x=80

x=16

Now, we plug this into the first equation to find y.

y=82.

So, the larger number is 82 and the smaller number is 16.

I hope this helps! Have a great day!

The sides of a triangle are 9,11,13.The largest side of a triangle like this is 39.The other two sides of the second triangle are?
A) 18;22 B)27;33 C)3;11 3 D)48;50

Answers

Length of other two sides is 27:33

Option B

Step-by-step explanation:

Here we have , The sides of a triangle are in ratio 9:11:13.The largest side of a triangle like this is 39. Let's calculate other two sides of the second triangle:

[tex]9:11:13[/tex] is the ratio  ,largest ratio value is 13 which represents largest side ratio whose length is 39 :

⇒ [tex]13x = 39\\[/tex]

⇒ [tex]x = \frac{39}{13}\\[/tex]

⇒ [tex]x = 3[/tex]

Now, other two sides are 9 x and 11 x

i.e. [tex]9x = 9(3) = 27[/tex]

 [tex]11x = 11(3) = 33[/tex]

So, lengths of all the three sides are 27:33:39 . And, Length of other two sides is 27:33`

What is this please help

Answers

Answer:

y=9

y=1

y= -7

y= -15

Step-by-step explanation:

You have to use the number in the x colum and fill in itnot te equation

y= -4x+1

Start with the first number, -2

y= -4(-2)+1          multiply -4 and -2 because of PEMDAS

y=8+1                         simplify

y=9

Now do the next number, 0

y= -4(0)+1        Multiple -4 and 0  because of PEMDAS (Anything times 0 is 0)

y=1

Now do the next number, 2

y= -4(2) + 1      Multiply -4 and 2 because of PEMDAS

y= -8 + 1       Simplify

y=-7

Now do the next number, 4

y= -4(4) +1         Multiply -4 and 4 because of Pemdas

y = -16 +1

y= -15

Select "Yes" or "No" to indicate whether the ordered pair is on the graph of the function f(x)=−16x+1 .

Answers

To check if the pair is on the graph, plug the x value into the x in the equation, and solve. If the solution to the equation matches the y value from your ordered pair, it’s on the graph, so mark “yes”. If the solution isn’t the same, it’s not on the graph, so mark “no”.

Simplify 5(x - 6).
5x - 30
O-X
5x - 6

Answers

Answer:

[tex]5x - 30[/tex]

Step-by-step explanation:

We want to simplify

[tex]5(x - 6)[/tex]

We use the distributive property of real numbers which says that:

[tex]a(b + c) = ab + ac[/tex]

We apply the distributive property to get;

[tex]5(x - 6) = 5 \times x - 5 \times 6[/tex]

This implies that:

[tex]5(x - 6) = 5 x - 30[/tex]

Therefore the correct answer is 5x-30

Write an expression using the distributive property to find the product of 7x63

Answers

Answer:

7(60+3)

Step-by-step explanation:

The distributive property is a(b+c) = ab+ac

7 x 63 = (7x60) + (7x3) = 7(60+3)

So in distributive form it would be 7(60+3)

Answer:

7(1·9)

Hope this helps

How to solve -x+3y=4 ,3x+2y=-7

Answers

Answer:

x = -29/11 , y = 5/11

Step-by-step explanation:

-x+3y=4 ,..........(1)

3x+2y=-7 ............(2)

Solve simultaneously using elimination method

Multiply equation 1 by 3

It gives

-3x + 9y = 12

3x + 2y = -7..........(2) , add both equations

--------------------------

11y = 5

Divide both sides by 11

y = 5/11

Put value of y into equation (2)

3x +2y = -7

3x + 2(5/11) = -7

3x + 10/11 = '-7

Subtract 10/11 from both sides

3x +10/11 - 10/11 = -7  - 10/11

3x = -87/11

Divide both sides by 3

3x/3 = -87/11 ÷ 3

x = - 87/11 × 1/3

x = -29/11

Therefore x = -29/11 , y = 5/11

I hope this was helpful, please mark as brainliest

1. Point  is on the line . Find the measure of angle .

Answers

Answer:

180°

Step-by-step explanation:

Answer:180

Step-by-step explanation:

ErvIn bowled 7 games last weekend. his scorers are : 155,165,138,172,193,142. what is the range of ErvIn scores

Answers

The range of a set of values is the lowest and highest number of that data set.

First, lets put the numbers from least to greatest.

138, 142, 155, 165, 172, 193

Second, find the lowest and greatest number in the data set.

138 is the lowest and 193 is the highest number in the data set.

Therefore, 138 and 193 is the range.

Best of Luck!

A rope is cut into equal pieces, and 8 of the pieces are used to tie up
packages. The fraction below shows how much of the rope is left over
According to the fraction, into how many pieces was the rope cut?
A. 8
B. 11
C. 3
D. 5

Answers

Answer:A

Step-by-step explanation:

8 is the only equal number

Answer:

i believe its 8 :)

What is the positive solution to the equation 2x^2+25=73

Answers

Answer: I think it's 0.886  or its 3.386

Step-by-step explanation:

Because  1. x =(5-√73)/4=-0.886and the other one is 2. x =(5+√73)/4= 3.386

Final answer:

The positive solution to the equation 2x² + 25 = 73 is x = √24, which is approximately 4.9.

Explanation:

The student is asking for the positive solution to the equation 2x² + 25 = 73. To solve this, we first isolate the quadratic term by subtracting 25 from both sides of the equation, resulting in 2x² = 48. Then, we divide both sides by 2, simplifying to x² = 24. Taking the square root of both sides gives us two solutions, x = √24 and x = -√24. Since we're seeking the positive solution, we take the positive square root, which yields x = √24 or about 4.9.

Mrs. Byrne's class went raspberry picking. The data show the weights of the cartoons of raspberries the students picked. Make a tally table and a line plot to show the data. 3/4, 1/4, 2/4, 4/4, 1/4, 1/4, 2/4, 3/4, 3/4
What is the difference in weight between the heaviest carton and lightest carton of rasperries?

Answers

Answer:

The difference is 3/4

Step-by-step explanation:

First, you look at the smallest and biggest amount. Then, you subtract! 4/4-1/4=3/4

Define highest common factor

Answers

Answer:

Of two numbers, The largest whole number which is a factor of both.

Step-by-step explanation:

Find the volume of a cylinder if the radius is 12 inches and the height is 17 inches

Answers

Answer:

Volume of the cylinder = [tex]7686.72\,inches^3[/tex]

Step-by-step explanation:

Radius(r) of the cylinder= [tex]12\,inches[/tex]

Height(h) of the cylinder= [tex]17\,inches[/tex]

Volume of a cylinder is :

                   [tex]\pi \times r^2\times h[/tex]

As,

          [tex]\pi =\dfrac{22}{7}=3.14[/tex]

Volume is:  

            [tex]=3.14\times (12\times 12)\times 17\\\\=3.14\times 144 \times 17\\\\=3.14\times 2448\\\\=7686.72\,inches^3[/tex]

The volume of the cylinder is: [tex]7686.72\,inches^3[/tex]                    

1.2 per 1000 delivery hospitalizations equals how many births

Answers

Answer:

1200

Step-by-step explanation:

1.2 * 1000

1200

Answer:  1200

Answer:

1200

Step-by-step explanation:

1.2 per 1000 delivery hospitalizations equals how many births?

since they are 1.2 per 1000

= 1.2 * 1000

= 1200

Which of the following are possible equations of a parabola that has no real solutions and opens downward?
y>= -(x+4)^2 - 2
y>= -(x+4)^2 + 2
y>= -x2-2
y>=(x-4)^2 + 2
y>= -(x-4)^2 - 2

Answers

Answer:

[tex]y = - {(x - 4)}^{2} - 2[/tex]

[tex]y = - {(x + 4)}^{2} - 2[/tex]

Step-by-step explanation:

The vertex form of a parabola is given as

[tex]y = a {(x - h)}^{2} + k[/tex]

If this parabola opens downward, then a<0.

This means for a function opening downward not to have a solution, the k value must also be negative and taking a square root of a negative number will not give real solution.

From the given options, examples of such functions are:

[tex]y = - {(x + 4)}^{2} - 2[/tex]

and

[tex]y = - {(x - 4)}^{2} - 2[/tex]

Answer:it’s y>=-(x+4)^2-2

Step-by-step explanation:

I checked it in my graphing calculator and it works. I’m also doing the program sooo

the sidees of a triangle measures 10cm 10 cm and 6cm what type of triangle is it?

i need help

Answers

Answer:

Isosceles Triangle

Step-by-step explanation:

Since, sides of triangle measures 10 cm, 10 cm & 6 cm.

Therefore, two sides of triangle have equal measurement.

Hence, it is an ISOSCELES triangle.

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