Question 1144729
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x varies directly as t and t varies inversely as the square of y, 
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{{{constants}}}{{{k}}}{{{and}}}{{{K}}}


{{{system(x=kt,t=K/y^2)}}}


Substitute for t.
{{{x=k(K/y^2)}}}

{{{x=(kK)/(y^2)}}}-----------------This is choice C.