document.write( "Question 113075: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter. \n" ); document.write( "
Algebra.Com's Answer #82503 by ankor@dixie-net.com(22740)\"\" \"About 
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:
\n" ); document.write( "You know the perimeter = 2L + 2W
\n" ); document.write( "Therefore
\n" ); document.write( "P = 2(3x – 4) + 2(7x + 10)
\n" ); document.write( ":
\n" ); document.write( "Multiply what's inside the brackets
\n" ); document.write( "P = 6x - 8 + 14x + 20
\n" ); document.write( ":
\n" ); document.write( "Combine like terms:
\n" ); document.write( "P = 6x + 14x - 8 + 20
\n" ); document.write( ":
\n" ); document.write( "P = 20x + 12
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