2 years ago

If y varies inversely with x and y =5 when x=20 find x when y = -4

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

7 0

Answer:

x=-25

Step-by-step explanation:

Inverse variation

xy =k

We know x and y

20*5 =k

100 =k

So the formula is

x y = 100

We know y = -4

x (-4) = 100

Divide each side by -4

-4x/-4 = 100/-4

x = -25

You might be interested in

Describe how you regroup when you find the sum of 64 + 43

vaieri [72.5K]

When you regroup you are basically breaking down the problem.
You would do 60 + 40=?
Then you would do 4 + 3= ?
Your answer would come out to 107

4 0

3 years ago

A box of oranges weighs 4 kg. if one orange weighs 80 g how many oranges are in the box

stepladder [879]

There would be 20 oranges in each box

6 0

2 years ago

MIGHT GIVE BRAINLIEST. <br><br>Calculator What is the surface area of the square pyramid?

zaharov [31]

Answer:

I need to know the dimensions to solve

3 0

2 years ago

PLZ HELP I WILL GIVE THE BRAINLEST AND 22 PTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! An expression is shown below: 6(m + 2 +

n200080 [17]

Answer:

part A: expression 1: 6(8m+2)

expression 2: 6m+12+42m

Part B: 6(m+2+7m)= 6(8m+2)

combine like terms is 6(m+2+7m), so it is 6(2+8m) or 6(8m+2)

6(8m+2)= 6(8m+2)

Part C: 6m+12+42m=6(m+2+7m)

m=0

6(0+2+7(0))=6(0)+12+42(0)

6(2)= 12

12=12

7 0

3 years ago

Simplify the following expression:

Bas_tet [7]

Answer:

3x-8y+40z

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

If y varies inversely with x and y =5 when x=20 find x when y = -4​

If y varies inversely with x and y =5 when x=20 find x when y = -4