document.write( "Question 94457: A rectangle has sides of 3x-4 and 7x+10. Find the expression that represents its perimeter. \n" ); document.write( "
Algebra.Com's Answer #69458 by kiljoy(51)\"\" \"About 
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We'll use L and W for this as in length and width.\r
\n" ); document.write( "\n" ); document.write( "\"L=3x-4\"
\n" ); document.write( "\"W=7x%2B10\"\r
\n" ); document.write( "\n" ); document.write( "To find perimeter, use \"P=2L%2B2W\"
\n" ); document.write( "\"P=2%283x-4%29%2B2%287x%2B10%29\"
\n" ); document.write( "\"P=6x-8%2B14x%2B20\"
\n" ); document.write( "\"P=20x%2B12\"\r
\n" ); document.write( "\n" ); document.write( "That should do it, for you.
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