document.write( "Question 547630: the height of a triangle is 5cm more than three times the base. if the area of the triangle is 6cm^2, what is the base.\r
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document.write( "A=6cm^2
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document.write( "h=3b+5cm
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document.write( "b=?\r
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document.write( "6cm^2=(1/2) x b x (3b+5cm)\r
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document.write( "I keep getting stuck at: 12cm^2 = 3b^2 + (5cm x b)\r
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document.write( "Per the answer key, the answer is b= (4/3)cm but I am unable to get to the answer from the question, nor the question from the answer as I always get stuck in the same place \n" );
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Algebra.Com's Answer #356531 by ankor@dixie-net.com(22740) You can put this solution on YOUR website! the height of a triangle is 5cm more than three times the base. \n" ); document.write( " if the area of the triangle is 6cm^2, what is the base. \n" ); document.write( ": \n" ); document.write( "Let x = the length of the base \n" ); document.write( "then \n" ); document.write( "(3x+5) = the height \n" ); document.write( ": \n" ); document.write( "The Area \n" ); document.write( " \n" ); document.write( "get rid of the fraction, multiply both sides by 2 \n" ); document.write( "x(3x+5) = 12 \n" ); document.write( "3x^2 + 5x = 12 \n" ); document.write( "3x^2 + 5x - 12 = 0 \n" ); document.write( "A quadratic equation, we can factor to: \n" ); document.write( "(3x-4)(x+3) = 0 \n" ); document.write( "the positive solution, all we want here \n" ); document.write( "3x = 4 \n" ); document.write( "x = \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "see if that checks out \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |