document.write( "Question 438170: Suppose z varies directly with x and inversely with the square of y. When x=9, y=5, and z=36, find the equation of variation.\r
\n" ); document.write( "\n" ); document.write( "I started by using the formula z=kx/y^2\r
\n" ); document.write( "\n" ); document.write( "36=k(9)/35\r
\n" ); document.write( "\n" ); document.write( "but then I get confused?! Can someone please explain this to me?
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Algebra.Com's Answer #303073 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
you wrote the equation you need\r
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\n" ); document.write( "\n" ); document.write( "just solve it for the constant \"k\"\r
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\n" ); document.write( "\n" ); document.write( "36=k(9)/35 ___ 4 = k / 35 ___ 140 = k\r
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\n" ); document.write( "\n" ); document.write( "(z)(y^2) = 140(x)
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