document.write( "Question 2291: If Y varies jointly as X and Z and Y=60 when X=10 and Z= -3, what is Y when X=8 and Z=15? \n" ); document.write( "

Algebra.Com's Answer #977 by matthew_sessoms(39) $\"\"$ $\"About$

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y=kxz
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\n" ); document.write( "60=k(10)(-3)
\n" ); document.write( "60=-30k
\n" ); document.write( "k=-2
\n" ); document.write( "

\n" ); document.write( "y=-2xz
\n" ); document.write( "

\n" ); document.write( "y=-2(8)(15)
\n" ); document.write( "y=-240
\n" ); document.write( "
\n" ); document.write( "MS \n" ); document.write( "

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