document.write( "Question 189025: Find and equation of varitation for the given situation.\r
\n" ); document.write( "\n" ); document.write( "1) y varies inversely as the square of x, and y=6 when x=3\r
\n" ); document.write( "\n" ); document.write( "2) y varies directly as x and inversely as z, and y=4 when x=14 and z=15\r
\n" ); document.write( "\n" ); document.write( "3) y varies jointly as x and z inversely as the square of w , and y=12/5 when x=16, z=3, w=5\r
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\n" ); document.write( "\n" ); document.write( "I really need help how to solve this. Im lost and need help. Thanks
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Algebra.Com's Answer #141781 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Find and equation of varitation for the given situation.
\n" ); document.write( "1) y varies inversely as the square of x:
\n" ); document.write( "y = k/x
\n" ); document.write( "and y=6 when x=3
\n" ); document.write( "6 = k/3
\n" ); document.write( "k = 18
\n" ); document.write( "Equation: y = 18/x
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\n" ); document.write( "\n" ); document.write( "2) y varies directly as x and inversely as z:
\n" ); document.write( "y = kx/z
\n" ); document.write( "y=4 when x=14 and z=15
\n" ); document.write( "4 = k*14/15
\n" ); document.write( "k = 60/14
\n" ); document.write( "k = 30/7
\n" ); document.write( "--
\n" ); document.write( "Equation: y = (30/7)(x/z)
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\n" ); document.write( "3) y varies jointly as x and z inversely as the square of w:
\n" ); document.write( "y = k[xz/w^2]
\n" ); document.write( "y=12/5 when x=16, z=3, w=5
\n" ); document.write( "(12/5) = k[16*3/25]
\n" ); document.write( "k = (25*12/5*3)=20
\n" ); document.write( "---
\n" ); document.write( "Equation: y = 20[xz/w^2]
\n" ); document.write( "====================================
\n" ); document.write( "Cheers.
\n" ); document.write( "Stan H.\r
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