document.write( "Question 517650: harriet wants to put up fencing around three sides of her rectangular yard and leave a side of 20 feet unfenced. If the yard has an area of 680 square feet, how many feet of fencing does she need ?\r
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document.write( "a)34
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document.write( "b)40
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document.write( "c)68
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document.write( "d)88
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document.write( "e)102\r
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document.write( "Note : I Know the Answer but I dont kno How to solve Please help me . \n" );
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Algebra.Com's Answer #344875 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! harriet wants to put up fencing around three sides of her rectangular yard and leave a side of 20 feet unfenced. \n" ); document.write( " If the yard has an area of 680 square feet, how many feet of fencing does she need ? \n" ); document.write( ": \n" ); document.write( "We're told that one side is 20 ft, by the fact that a 20 ft side is unfenced; \n" ); document.write( "Assume W = 20' \n" ); document.write( ": \n" ); document.write( "Area: L * W = 680 \n" ); document.write( "20*L = 680 \n" ); document.write( "L = 680/20 \n" ); document.write( "L = 34' is the length, (the yard is 34 by 20) \n" ); document.write( ": \n" ); document.write( "Perimeter: P = 2L + 2W, we only have 3 sides to fence, therefore \n" ); document.write( "Fence = 2L + W \n" ); document.write( "Fence = 2(34) + 20 = 88' ft of fence required \n" ); document.write( " |