document.write( "Question 874448: How do I do tis?
\n" ); document.write( "If x varies directly as y, ad x=20 when y=4, find x when y=9.
\n" ); document.write( "A. x=80
\n" ); document.write( "B. 36
\n" ); document.write( "C. x=180
\n" ); document.write( "D. x=45 \n" ); document.write( "

Algebra.Com's Answer #527489 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "Let k represent the constant of the direct variation
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document.write( " x = ky
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document.write( "20 = 4k
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document.write( " 5 = k
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document.write( "x = 5y
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document.write( "x = 45 when y = 9
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