Question

If z is inversely proportional to x and z = 5 when x = 7, find the value of x when z = 70.

Answer 1

Answer:9.8

Step-by-step explanation:if Z is5 and X is 7 so now. slove this inversely proportion is Z=1/X so, 5=7/1. = 1×5=7.

5=7

7/5

=1.4 is our K means contant

Now Z=70 X=!

ZK=1/X (K IS CONSTANT)

70×1.4=1/X

70×1.4×1=X

9.8=X

Answer 2

Answer=0.5

__________

Step-by-step explanation:

• z=k/x

When z =5 and x=7

• z=k/x

• 5=k/7

35=k

__________

HOW?

U add seven on both sides 7(5)=(k/7)7

cut seven with seven and multiply the other seven with five

__________

When z=70 find x

• z=35/x

• 70=35/x

Suppose there is a one underneath 70 and u cross multiply (70/1=35/x)

• 70x=35

• 70x÷70=35

• x=35÷70

• divide and x=0.5

Hope this helps!!