y is inversely proportional to x.
When y = 7, x= 9
Work out the value of y when x = 21.

Answers

Answer 1

Answer:

y = 3

Step-by-step explanation:

y is inversely proportional to x setup:  y = k/x

'k' is the constant of variation; find this first

7 = k/9

k = 63

now use 'k' to find 'y'

y = 63/21

y = 3


Related Questions

Write the quadratic function in standard form.
f(x) = - 2(x - 6)^2 - 5
f(x) =???

Answers

-2(x^2-12x+36)-5
-2x^2+24x-72-5
f(x)=-2x^2+24x-77 is the final answer in standard form

Mrs. Ortega has 17 cups of flour. She decided
cups of
3
to make 2 cakes. Each cake used 2
4.
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eachfused 1
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Step-by-step explanation:

4/5 ÷ 1/2 – 3/4 × 3/5( these are fractions)

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Answer:

23/20 or 1  3/20  or  1.15

Answer:

1 3/20

Step-by-step explanation:

Can somebody help me

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Answer:

1 3

- , -

2 4

..

..

..

...

........

find the distance between two points (-3,2) and (3,0)

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Answer:

[tex]\sqrt{40}[/tex]

Step-by-step explanation:

If we draw a right triangle, it would have legs 6 and 2.

72 pens are stored in 24 containers. Which of the following expresses the unit rate for this scenario?

A
72 pens per container

B
24 pens per container

C
3 containers per pen

D
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(PLZZZZZZZZZ I NEEEDDD HELP) IM IN THE 6TH GRADE PLZZZ I NEED HELP

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You divide 72/24
The answer is 3

HELP MEE ILL GIVE BRAINLIEST!!

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Answer:

16 by 8

Step-by-step explanation:

i need help plssssssssssssss

Answers

Answer:

It doesn't show what the drop down is. However, both of those are linear expressions.

Sergio's expressionn siplifies to: 9+3x (because two minuses cancel each other).

Leon's expression cancels to 12+6x (because 9+3=12)

Step-by-step explanation:

You have to show the dropdown to be able to answer exactly what they are looking for as an answer.

If you can solve this you are a Genius and will be rewarded 100 points

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Answer:

tbh im really not sure..if im right, then hallelujah!! but here... n=1/f-3

Step-by-step explanation:

im sorry its prob not right but i tried

Answer: 3

Step-by-step explanation: Your Answer Is 3.

How do you graph g(x)=f(x)+5

Answers

Make a positive line going through (0, 5)

Maria is reading an article about ways that cowboys are portrayed in movies and in books. Read this excerpt:

A lot of fiction is set in the American West in the 1800s, a time when settlers poured into the wide-open prairies of Oklahoma and Texas. Cowboy heroes in movies and books worked to tame the land. They are often portrayed as valiant men who fought for justice in a time of lawlessness.

What is the meaning of the phrase tame the land as it is used in the passage above?

A.
It means that the land was unsafe.
B.
It means that the land was not settled.
C.
It means that the land was not farmed.
D.
It means that the land was abandoned.

Answers

Answer:

B

Step-by-step explanation:

Answer:B.

It means that the land was not settled.

Step-by-step explanation:

A fish tank containing 42 gallons of water when it began to make each day the tank last for gallons of water how many days until the tank only contains 14 gallon

Answers

7 days till the tank contains 14 gallons (if the day when it contains 42 gallons counts as day 0)

Rewrite using a single positive exponent.
57
54

Answers

Answer:

60

Step-by-step explanation:

54, 57= you add 3 onto the unit number.

if y=3 when x=4, find y when x=6

Answers

Answer:

y = 2

Step-by-step explanation:

(x)(y) = k    Inverse relationship

(4)(3) = k

12 = k

(6)(y) = 12

y = 2

Answer:

Step-by-step explanation:

at a concession stand three hotdogs in for hamburgers cost $13.50 for hotdogs and three hamburgers cost $12.75 find the cost of one hotdog and find the cost of one hamburger

Answers

Price of Hotdogs you do 14.50/3= 4.50
Price of Hamburgers 12.75/3=4.25

Angel and Jayden were at track practice. The track is 2/5 kilometers around.
Angel ran 1 lap in 2 minutes,
Jayden ran 3 laps in 5 minutes.
a) How many minutes does it take Angel to run
one Kilometer?
b) How many minutes does it take Jayden to run
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will give brainlist!!

Answers

A.) 5 minutes
B.) 4 minutes

5. How do natural numbers differ from whole numbers?​

Answers

Answer:

Natural numbers are all numbers 1, 2, 3, 4… They are the numbers you usually count and they will continue on into infinity. Whole numbers are all natural numbers including 0 e.g. 0, 1, 2, 3, 4… Integers include all whole numbers and their negative counterpart

Please help!! Giving brainliest and extra points!! (click on photo)

Answers

Answer:

circumphrence

Step-by-step explanation:

Answer:

Area

Step-by-step explanation:

Because area covers

Evaluate each expression if a = 2 and b = 8.
1. 3a + 1

Answers

Answer:

7

Step-by-step explanation:

3(a)+1 A=2

3(2)+1

Answer:

7

Step-by-step explanation:

We need to input the values of "a" into the equation.

1) 3 x 2 + 1

So 3 x 2 = 6 and plus one is 7.

brainliest! please help i'm a bit confused

Answers

Answer:

45

Step-by-step explanation:

they only asked for the hours

Answer:

45 or 150 with boat. Hope it helps!

3x^2- 10x - 8 please help with this

Answers

So why I now yes when she where it go to get the stuff
b^2 - 4xaxc
a=3 b= -10 c= -8

(-10)^2 -4 x3 x (-8)

100 + 96

196

Sqrt(196) = 14

x1 = (-b-sqrt(196))/2a
x1= (10-14)/6
x1= -2/3

x2 = (-b+sqrt(196))/2a
x2 = (10+14)/2a
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The highway mileage (mpg) for a sample of 9 different models of a car company can be found below.

33 38 48 34 21 24 26 23 26


Find the mode:


Find the midrange:


Find the range:


Estimate the standard deviation using the range rule of thumb:


Now use technology, find the standard deviation:

Answers

Answer:

34

Step-by-step explanation:

because I did the test

Answer:

34

Step-by-step explanation:

Ebony is x years old.
Her brother is 4 years older.
Her Mum is 3 times her age.

Write an expression for the age of:
Her mum
Her brother

Answers

Answer:

Ebony's brother is x + 4 years old.

Ebony's mum is 3x years old.

Explanation:

Since Ebony is x years old, and her brother is 4 years older than her, the expression is x + 4, as her brother is +4 years older.

Ebony's mum is 3 times Ebony's age, which is x. 3 times x is shortened into 3x.

find the values of x y and z

Answers

9514 1404 393

Answer:

x = 18√2y = 18√3z = 36

Step-by-step explanation:

These "special" right triangles have side length ratios that it is useful to remember.

45°-45°-90° triangle

Sides have the ratios 1 : 1 : √2. That is, x is √2 times as long as the side length shown as 18.

  x = 18√2

30°-60°-90° triangle

Shortest to longest, sides have the ratios ...

  1 : √3 : 2

That is, y is √3 times the length of the side marked 18, and z is 2 times the length of the side marked 18.

  y = 18√3

  z = 2·18 = 36

12z−6+15z=27z−5 how many solutions

Answers

3 is the answer

I did the test

Answer:

no solutions

Step-by-step explanation:

if you simplify the left side you will get 27z - 6 and the other side is 27z - 5

no value for 'z' will ever get these two expressions to equal each other because 6≠5

Micah has 15 games. Micah has three more games than kelly. Kelly has K number of games. Move values into the boxes to create an equation to represent this senerio

Answers

Answer:

Equation = K + 3 = 15

K = 12 games

Step-by-step explanation:

According to the scenario, calculation of the given data are as follows,

Micah games = 15

Let, Kelly games = K

As Micah has three more games than Kelly, then

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This equation shows the scenario.

We can find the number of games Kelly has by using this equation,

K+3 = 15

K = 15 - 3

K = 12

Hence, Kelly has 12 games.

Whats is percentage of 25% to 24

Answers

Answer:

96%

hope this helps!!:)

Step-by-step explanation:

Answer:

I think the question is supposed to be What is 25% of 24? Or you are missing a component of the question

Step-by-step explanation:

You could multiply .25 times 24 to get the answer because changing 25% to a number you can use in an equation means adding a decimal place and moving two places to the left.

.25 x 24= 6

6 is 25% of 24

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Answers

Answer:

5. 20+0.12x=80

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Step-by-step explanation:

Which set of numbers could represent the side lengths of a right triangle? ​

Answers

Answer:

B

Step-by-step explanation:

Price - $375
Discount - 20%
Total =

Answers

Answer: 20

Step-by-step explanation: since i helped can i  have brainlist plesa :D

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