Question

If y varies directly as x and z, and Y =8/3when x = 1 andz = 4, find y when x = 6 andz = 3.
3

Answer 1

Answer: its D

Explanation:

Answer 2

y = 12.

Explanation:

y = kxz where k is a constant

When x=1,y = 8/3 and z = 4:

8/3 = 1*4k

k = 8/3 * 1/4

k = 2/3.

So our equation of variation is y = 2/3 xz

When x = 6 and z = 3

y = 2/3 * 3 * 6

y = 2 * 6

y = 12.