document.write( "Question 69253: The length of a rectangle is 4 cm more than 2 times its width. If the area of the rectangle is 74 cm2, find the dimensions of the rectangle to the nearest thousandth.\r
\n" ); document.write( "\n" ); document.write( "The answer that I have figured is w=5.165 and L=14.330 and I have no idea if this is correct. Can I get a little help with this problem. Thanks.
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Algebra.Com's Answer #49302 by ptaylor(2198)\"\" \"About 
You can put this solution on YOUR website!
I WOULD SAY THAT YOU ARE RIGHT ON THE MONEY ON THIS PROBLEM. GOOD WORK!!!!\r
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\n" ); document.write( "\n" ); document.write( "Let x= the width of the rectangle
\n" ); document.write( "Then 2x+4=length of rectangle (4 cm more than twice the width)\r
\n" ); document.write( "\n" ); document.write( "Area of rectangle =l*w=(2x+4)(x) so our equation to solve is:\r
\n" ); document.write( "\n" ); document.write( "\"%282x%2B4%29%28x%29=74\" get rid of parens\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2%2B4x=74\" subtract 74 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"2x%5E2%2B4x-74=0\" divide both sides by 2\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B2x-37=0\" quadratic in standard form\r
\n" ); document.write( "\n" ); document.write( "We'll solve using the quadratic formula:\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-2+%2B-+sqrt%28+2%5E2-4%2A%28-37%29+%29%29%2F%282%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-2+%2B-+sqrt%28152+%29%29%2F%282%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-2+%2B-+sqrt%28152+%29%29%2F%282%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-2+%2B-12.330+%29%29%2F%282%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-2+%2B12.330+%29%29%2F%282%29+\"
\n" ); document.write( "\"x+=+%2810.330+%29%29%2F%282%29+\"
\n" ); document.write( "\"x=5.165\" cm -----------------width of rectangle\r
\n" ); document.write( "\n" ); document.write( "\"2x%2B4=2%2A5.165%2B4=14.330\" cm---------------length of rectangle\r
\n" ); document.write( "\n" ); document.write( "We'll discount the negative value for x\r
\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "Area = l*w=14.330*5.165=74.01~74 ---ok\r
\n" ); document.write( "\n" ); document.write( "Hope this helps----ptaylor\r
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