document.write( "Question 856552: If y varies directly as x, what is the value of y in these ordered pairs?
\n" ); document.write( "(5,8) and (10,y)
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Algebra.Com's Answer #516029 by Alan3354(69443)\"\" \"About 
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If y varies directly as x, what is the value of y in these ordered pairs?
\n" ); document.write( "(5,8) and (10,y)
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\n" ); document.write( "Varies directly means y = k*x
\n" ); document.write( "8 = k*5
\n" ); document.write( "k = 1.6
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\n" ); document.write( "y = 1.6*10 --> y = 16
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\n" ); document.write( "Or,
\n" ); document.write( "5/8 = 10/y
\n" ); document.write( "5y = 80
\n" ); document.write( "y = 16
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