Question

y varies jointly as x and z. Write the appropriate joint-variation equation, and find y for the given values of x and z.

y = 120 when x = 8 and z = 20; x = 54 and z = 7
a.
; 283.5
c.
; 283.5
b.
; 201.07
d.
; 198.3

Answer 1

y = kxz

Answer 2

therefore:\[y' = \frac{y}{xz}(x'z')\]