If y varies inversely with x, and y=8 when x=10 find x when y=4

x = 4

Step-by-step explanation:

Given y varies inversely as x then the equation relating them is

y = ← k is the constant of variation

To find k use the condition y = 8 when x = 10

k = yx = 8 × 10 = 80

y = ← equation of variation

When y = 4, then

4 = ( multiply both sides by x )

4x = 80 ( divide both sides by 4 )

x = 20

3030 ur welcome

step-by-step explanation:

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p