document.write( "Question 1199201: Z varies directly as x^2. If z=50 when x=5, find when x=7 \n" ); document.write( "

Algebra.Com's Answer #832948 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "The problem says that  z = kx^2.\r\n" );
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document.write( "It also says that  50 = k*5^2 = 25k,  which implies  k = 2.\r\n" );
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document.write( "Hence,  z = 2x^2.\r\n" );
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document.write( "When x= 7,  z = 2*7^2 = 2*49 = 98.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved, with complete explanations.\r
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\n" ); document.write( "\n" ); document.write( "Best wishes are also attached.\r
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