document.write( "Question 958864: An entry in the Apple Festival Poster Contest must be rectangular and have an area of 1200 square inches. Also, its length must be 20 inches longer than its width. Find the dimensions each entry must have. \n" ); document.write( "
Algebra.Com's Answer #586022 by lwsshak3(11628)\"\" \"About 
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An entry in the Apple Festival Poster Contest must be rectangular and have an area of 1200 square inches. Also, its length must be 20 inches longer than its width. Find the dimensions each entry must have.
\n" ); document.write( "***
\n" ); document.write( "let x=width of rectangle
\n" ); document.write( "x+20=length of rectangle
\n" ); document.write( "width*length=area
\n" ); document.write( "x(x+20)=1200
\n" ); document.write( "x^2+20x=1200
\n" ); document.write( "x^2+20x-1200=0
\n" ); document.write( "solve for x by quadratic formula:
\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "a=1, b=
\n" ); document.write( "x=-46.06(reject)
\n" ); document.write( "or
\n" ); document.write( "x=26.06
\n" ); document.write( "x+20=46.06
\n" ); document.write( "dimensions each entry must have:
\n" ); document.write( "width=26.06 inches
\n" ); document.write( "length=46.06 inches\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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