SOLUTION: If y varies directly as x and inversely as the square root of w, and y=63 when x=7 and w=8, find when x=3 and w=18.

Algebra ->  Functions -> SOLUTION: If y varies directly as x and inversely as the square root of w, and y=63 when x=7 and w=8, find when x=3 and w=18.      Log On


   

Question 991782: If y varies directly as x and inversely as the square root of w, and y=63 when x=7 and w=8, find when x=3 and w=18.
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
y=kx%2Fsqrt%28w%29 but you can rationalize to y=kx%2Asqrt%28w%29%2Fw.

Your first set of data allows you to find the value for k:
k=y%2Asqrt%28w%29%2Fx. You should be able to handle the rest.