document.write( "Question 1057348: Find an equation of combined variation. Then solve for the missing value.
\n" ); document.write( "w varies directly as x and inversely as y.
\n" ); document.write( "One set of values is w = 3, x = 18, and y = 4.
\n" ); document.write( "Find w when x = 12 and y = 4. \n" ); document.write( "
Algebra.Com's Answer #672420 by Cromlix(4381)\"\" \"About 
You can put this solution on YOUR website!
Hi there,
\n" ); document.write( "w varies directly as x and inversely as y.
\n" ); document.write( "w = kx/y
\n" ); document.write( "k is the constant of proportion.
\n" ); document.write( "To find k use first set of values.
\n" ); document.write( "3 = k18/4
\n" ); document.write( "Cross multiply.
\n" ); document.write( "k18 = 12
\n" ); document.write( "k = 12/18
\n" ); document.write( "k = 0.67 (2 decimal places)
\n" ); document.write( "Formula:
\n" ); document.write( "w = 0.67x/y
\n" ); document.write( "Using the formula:
\n" ); document.write( "w = 0.67x/y
\n" ); document.write( "w = (0.67 * 12)/4 (* = times)
\n" ); document.write( "w = 2.01 (2 decimal places)
\n" ); document.write( "Hope this helps :-)\r
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