document.write( "Question 954558: The perimeter of a rectangle is 30 inches. If its length is three times its width, find the dimensions \n" ); document.write( "
Algebra.Com's Answer #583001 by macston(5194)![]() ![]() You can put this solution on YOUR website! W=width; L=length=3W; P=perimeter=2(L+W)=30 inches \n" ); document.write( "P=2(L+W) \n" ); document.write( "30 inches=2(L+W) Divide each side by 2. \n" ); document.write( "15 inches=L+W Substitute for L. \n" ); document.write( "15 inches=3W+W \n" ); document.write( "15 inches=4W Divide each side by 4. \n" ); document.write( "3.75 inches=W ANSWER 1: The width is 3.75 inches. \n" ); document.write( "L=3W=3(3.75)=11.25 inches ANSWER 2: The length is 11.25 inches. \n" ); document.write( "CHECK: \n" ); document.write( "Perimeter=2(L+W) \n" ); document.write( "30in=2(11.25in+3.75in) \n" ); document.write( "30in=2(15in) \n" ); document.write( "30in=30in \n" ); document.write( " |