document.write( "Question 1134152: If z is jointly proportional to x and y, and z =18 when x =0.4 and y =3 find z when x= 0.6 and y= 4 \n" ); document.write( "

Algebra.Com's Answer #751431 by josgarithmetic(39617) $\"\"$ $\"About$

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The language used tells you everything to arrange the starting equations and find proportionality or variation constant.\r
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\n" ); document.write( "\n" ); document.write( " $\"z=kxy\"$
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\n" ); document.write( " $\"k=z%2F%28xy%29\"$
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\n" ); document.write( " $\"k=18%2F%280.4%2A3%29\"$
\n" ); document.write( " $\"k=15\"$
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\n" ); document.write( " $\"highlight%28z=15%2Axy%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "Find z when x=0.6 and y=4;
\n" ); document.write( "substitute for those and evaluate! \n" ); document.write( "

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