SOLUTION: x varies directly as the square of s and inversely as t. How does x change when s is doubled? When both s and t are doubled?

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Question 390108: x varies directly as the square of s and inversely as t. How does x change when s is doubled? When both s and t are doubled?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
x+=+%28ks%5E2%29%2Ft, where k is the constant of proportionality. Then
x+=+%28k%282s%29%5E2%29%2Ft+=+4%28%28ks%5E2%29%2Ft%29. So the value of x is quadrupled when s is doubled.
x+=+%28k%282s%29%5E2%29%2F%282t%29+=+2%28%28ks%5E2%29%2Ft%29. So the value of x is doubled when both s and t are doubled.