document.write( "Question 411655: Can someone please show me how to solve\r
\n" ); document.write( "\n" ); document.write( "A poster is in the shape of a right triangle with a base that is three feet longer than the height. If the area of the triangle is 90 square feet, find the height.\r
\n" ); document.write( "\n" ); document.write( "a. 9'
\n" ); document.write( "b. 12'
\n" ); document.write( "c. 15'
\n" ); document.write( "d. 18'
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Algebra.Com's Answer #289305 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
A poster is in the shape of a right triangle with a base that is three feet longer than the height.
\n" ); document.write( "Let the height be \"x\".
\n" ); document.write( "Then the base is \"x+3\".
\n" ); document.write( "----
\n" ); document.write( "Area = (1/2) base * height
\n" ); document.write( "90 = (1/2)(x+3)x
\n" ); document.write( "180 = x(x+3)
\n" ); document.write( "x^2+3x-180 = 0
\n" ); document.write( "(x-12)(x+15) = 0
\n" ); document.write( "Positive solution:
\n" ); document.write( "x = 12 feet (height)
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "If the area of the triangle is 90 square feet, find the height.
\n" ); document.write( "a. 9'
\n" ); document.write( "b. 12'
\n" ); document.write( "c. 15'
\n" ); document.write( "d. 18'\r
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