Algebra.Com's Answer #372045 by Edwin McCravy(20055)![\"\"](\"/images/stars/stars-13.gif\")  
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a is directly proportional to b and inversely proportional to the square of c. if a=7 when b=9 and c=6, find a when b=4 and c=8
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document.write( "a = k· \r\n" );
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document.write( "Substitute the information from the situation when all the variables \r\n" );
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document.write( "7 = k· \r\n" );
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document.write( "Solve for k:\r\n" );
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document.write( "7 = k· \r\n" );
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document.write( "7 = k· \r\n" );
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document.write( "Multiply both sides by 4\r\n" );
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document.write( "28 = k\r\n" );
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document.write( "Substitute the value of k in the equation:\r\n" );
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document.write( "a = k·\r\n" );
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document.write( "a = 28·\r\n" );
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document.write( "Substitute the information from the other situation when all \r\n" );
document.write( "the variables BUT ONE are given:\r\n" );
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document.write( "a = 28·\r\n" );
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document.write( "a = 28· \r\n" );
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document.write( "Solve for the missing variable, which in this case is \"a\":\r\n" );
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document.write( "a = 28· \r\n" );
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document.write( "a = 28· \r\n" );
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document.write( "a =  \r\n" );
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document.write( "a =  \r\n" );
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document.write( "a =  or\r\n" );
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document.write( "a = 1.75\r\n" );
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document.write( "Edwin \n" );
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