document.write( "Question 406877: suppose that z varies directly with x and inversely with y, and x=5, y=4, and z=8. Write a function that models the joint variation. Then find z when x=32 and y=2 \n" ); document.write( "

Algebra.Com's Answer #287164 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "z varies directly with x and inversely with y
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document.write( "  z = kx/y 
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document.write( " x=5, y=4, and z=8
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document.write( "  8 = 5k/4
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document.write( " (4/5)*8 = k
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document.write( "   32/5 = k
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document.write( " z = (32/5)x/y
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document.write( "find z when x=32 and y=2
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document.write( " z = (32/5)(32/2
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document.write( " z = 102.4  \n" );
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