document.write( "Question 353545: a certain rectangle has an area of 80 square units. its length is one more than three times its width. what are the dimensions of the rectangle? draw a diagram, solve the problem, and write an equation \n" ); document.write( "
Algebra.Com's Answer #252598 by mananth(16946)\"\" \"About 
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let width be x
\n" ); document.write( "length = 3x+1
\n" ); document.write( "..
\n" ); document.write( "x(3x+1)= 80
\n" ); document.write( "3x^2 +x=80
\n" ); document.write( "3x^2+x-80=0
\n" ); document.write( "3x^2+16 x -15x-80=0
\n" ); document.write( "x(3x+16)-5(3x+16)=0
\n" ); document.write( "(3x+16)(x-5)=0
\n" ); document.write( "So x = 5 the width.
\n" ); document.write( "length = 3x+1= 16
\n" ); document.write( "....
\n" ); document.write( "m.ananth@hotmail.ca
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