document.write( "Question 874641: If the perimeter of a rectangle is 42 cm and the area is 90 square cm, then what are the dimensions of the rectangle?
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Algebra.Com's Answer #527726 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "P = 2L +2w = 42cm
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document.write( "     L + w = 21  
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document.write( "A = Lw
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document.write( "   (21-w)w = 90cm^2
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document.write( "   w^2 - 21w + 90 = 0
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document.write( "  (w-15)(w-6) = 0
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document.write( "Dimensions: 15cm by 6cm \n" );
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