document.write( "Question 122434: The length of a rectangle measures 4 cm less than 4 times the width. If the area is 31.0 cm^2, find the dimensions. \n" ); document.write( "
Algebra.Com's Answer #89897 by ddreamfox(6)\"\" \"About 
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Let x = width
\n" ); document.write( " 4x-4 = length (4 cm less than 4 times the width)
\n" ); document.write( "since Area = length X width\r
\n" ); document.write( "\n" ); document.write( "Substitute values... to eqtn of Area\r
\n" ); document.write( "\n" ); document.write( "31 = x(4x-4)
\n" ); document.write( "31 = 4x2 - 4x
\n" ); document.write( "0 = 4x2 - 4x - 31
\n" ); document.write( "Using quadratic formula,\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "You'll get 2 values 1 positive and 1 negative...
\n" ); document.write( "The correct answer is the positive answer which is 3.328cm (rounded off)
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