If y varies directly as z and inversely as x and y = –18 and z = 3 when x = 6, find y when x = 5 and z = –5. 36

18

9

64

y = 36

Step-by-step explanation:

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

y = ← k is the constant of variation

To find k use the condition y = - 18, z = 3 when x = 6 , then

- 18 = ( multiply both sides by 6 )

- 108 = 3k ( divide both sides by 3 )

- 36 = k

y = ← equation of variation

When x = 5 and z = - 5, then

y = = = 36

d 192

step-by-step explanation:

we find our area to find area we multiply thoses numbers to get our answer so our area is 192