Solve the problem of combined variations using a constant of variation. If x varies directly as y and z and inversely as the square of r and x=12 when y=2, z=4 and r=2 find x when y=4, z=32 and r=8...

Solve the problem of combined variations using a constant of variation. If x varies directly as y and z and inversely as the square of r and x=12 when y=2, z=4 and r=2 find x when y=4, z=32 and r=8...

Suppose that Q varies directly with x and inversely with y.

The question is here in the link: http://postimg.org/image/6uq9f3opn/ The last step I could get was: Let K1 and K2 Be constant Z = 1.25(K1)(X ) + 0.64(K2)(Y2) ....

if x varies directly as y, and x=28 when y=4, find x when y=9

I have a story problem that involves using variation and functions, and I don't even know where to begin or how to read this problem. Could you walk through setting it up and solving it please! Thank...

if y=45 when x=3, find y when x is 5 I need help solving this