In a certain variation, z varies jointly as x & y, and inversely as w & z=2 when x=3, y=6 and y=6 and w= 10. Find z when x=2, y=3, and w=5

Answer 1

zw = kxy

(2)(10) = k(3)(6)

20 = 18k

10/9 = k

z(5) = (10/9)(2)(3)

5z = 10

z = 2

QED