document.write( "Question 116304: Please help me with this confusing question. I have tried and I just can't seem to figure it out. PLEASE HELP ME!!!! Here is the question:
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document.write( " What is The area of a rectangle is 24 square meters. Find the length and width of the rectangle if its length is 2 meters greater than its width. Use an equation and the formula ® area of a rectangle = (width)(length).\r
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Algebra.Com's Answer #84580 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! Start with the equation for the area of a rectangle ... \n" ); document.write( ". \n" ); document.write( "Area = width*length \n" ); document.write( ". \n" ); document.write( "or for short: \n" ); document.write( ". \n" ); document.write( "A = W * L \n" ); document.write( ". \n" ); document.write( "You are told that the area is 24 square meters, so substitute 24 for A to get: \n" ); document.write( ". \n" ); document.write( "24 = W * L \n" ); document.write( ". \n" ); document.write( "Next you are told that the length L is equal to the Width plus 2 meters. In equation form \n" ); document.write( "this is: \n" ); document.write( ". \n" ); document.write( "L = W + 2 \n" ); document.write( ". \n" ); document.write( "Return to the area equation and substitute W + 2 for L and you have: \n" ); document.write( ". \n" ); document.write( "24 = W * (W + 2) \n" ); document.write( ". \n" ); document.write( "Note that this equation has only 1 variable ... W. Since it only has one variable, \n" ); document.write( "we have a chance of solving it. Begin by multiplying out the right side: \n" ); document.write( ". \n" ); document.write( "24 = W^2 + 2W \n" ); document.write( ". \n" ); document.write( "Get this into standard quadratic form by subtracting 24 from both sides to get: \n" ); document.write( ". \n" ); document.write( "0 = W^2 + 2W - 24 \n" ); document.write( ". \n" ); document.write( "Transpose (switch) the sides of the equation to get it into the more familiar form: \n" ); document.write( ". \n" ); document.write( "W^2 + 2W - 24 = 0 \n" ); document.write( ". \n" ); document.write( "Factor the left side: \n" ); document.write( ". \n" ); document.write( "(W + 6)*(W - 4) = 0 \n" ); document.write( ". \n" ); document.write( "This equation will be true if one of the factors equals zero because a multiplication \n" ); document.write( "by zero on the left side will make the left side equal zero and therefore equal the zero on the \n" ); document.write( "right side. So set each factor equal to zero and solve for the value of W. \n" ); document.write( ". \n" ); document.write( "W + 6 = 0 \n" ); document.write( ". \n" ); document.write( "Subtract 6 from both sides and you get W = -6. But this doesn't make sense ... a negative width??? \n" ); document.write( ". \n" ); document.write( "Set the other factor equal to zero: \n" ); document.write( ". \n" ); document.write( "W - 4 = 0 \n" ); document.write( ". \n" ); document.write( "Add 4 to both sides and you get W = 4. That makes sense. The width is 4 meters and since \n" ); document.write( "the length is 2 meters longer than the width, the length is 6 meters. If you multiply the \n" ); document.write( "width (4) times the length (6) you get 24 square meters, so that checks. \n" ); document.write( ". \n" ); document.write( "The answers are length = 6 meters and width = 4 meters. \n" ); document.write( ". \n" ); document.write( "Hope this helps you to understand the problem. \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( " |