SOLUTION: a) y varies jointly as x and w and inversely as the square of z. Find the equation of variation when y=100, x=2, w=4, and z=20. (b) Then solve for y when x=1, w=5 and z=4. Plea

Question 1130836: a) y varies jointly as x and w and inversely as the square of z. Find the equation of variation when y=100, x=2, w=4, and z=20.
(b) Then solve for y when x=1, w=5 and z=4.
Please show me how you get the answer, thanks.
I have the formula y=kxw/z squared, but I don't know if that is jointly or inversely. If it is inversely, then I need help with the jointly, which I think is y=kxwz
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!

Now you can substitute the given values of part (b).
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