document.write( "Question 1147018: suppose z varies jointly with x and y and x varies directly with w. Show that z varies jointly with w and y \n" ); document.write( "

Algebra.Com's Answer #768320 by josgarithmetic(39630) $\"\"$ $\"About$

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$\"z=Cxy\"$ , and , $\"x=Kw\"$ , for two constants C and K.\r
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\n" ); document.write( "\n" ); document.write( " $\"system%28x=z%2F%28Cy%29%2Cx=Kw%29\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"z%2F%28Cy%29=Kw\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"z=Cy%2AKw\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"z=CKyw\"$ -----------------to read, z varies jointly as y and w. The variation constant is CK. \n" ); document.write( "

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