document.write( "Question 660866: The length of a rectangle is 2 1/2 times its width. Its area is 90 squares units. What are its dimensions? \n" ); document.write( "
Algebra.Com's Answer #411397 by ReadingBoosters(3246)![]() ![]() ![]() You can put this solution on YOUR website! a= lw = 90 \n" ); document.write( "l=2 1/2(w)\r \n" ); document.write( "\n" ); document.write( "Substitute l into the first equation \n" ); document.write( "(2 1/2(w))w = 90 \n" ); document.write( "2.52w^2 - 90 = 0 \n" ); document.write( "Multiples of 90: 30,3: 15,6 \n" ); document.write( "Using 15,6 as 2.5 times one of them must equal the other \n" ); document.write( "(2.5w+15)(w-6)=0 \n" ); document.write( "w = -15/2.5 NO \n" ); document.write( "w = 6 \n" ); document.write( "l = 2 1/2(6) = 15 \n" ); document.write( " |