document.write( "Question 884649: A carpenter is making a backyard deck. In his measurements, he has determined that he needs to make a support triangle with an area 22 mē. He knows that the base must be 1 less than 3 times the height. If the base is represented by 3x - 1 and the height = x, find the dimensions of the triangle. \n" ); document.write( "
Algebra.Com's Answer #534561 by nerdybill(7384) You can put this solution on YOUR website! A carpenter is making a backyard deck. In his measurements, he has determined that he needs to make a support triangle with an area 22 mē. He knows that the base must be 1 less than 3 times the height. If the base is represented by 3x - 1 and the height = x, find the dimensions of the triangle. \n" ); document.write( "base = 3x - 1 \n" ); document.write( "height = x \n" ); document.write( "area of triangle = (1/2)bh \n" ); document.write( "22 = (1/2)(3x-1)(x) \n" ); document.write( "44 = (3x-1)(x) \n" ); document.write( "44 = 3x^2-x \n" ); document.write( "0 = 3x^2-x-44 \n" ); document.write( "0 = 3x^2-12x+11x-44 \n" ); document.write( "0 = (3x^2-12x)+(11x-44) \n" ); document.write( "0 = 3x(x-4)+11(x-4) \n" ); document.write( "0 = (x-4)(3x+11) \n" ); document.write( "x = {-11/3, 4} \n" ); document.write( "throw out the negative solution (extraneous) leaving \n" ); document.write( "x = 4 m (height) \n" ); document.write( ". \n" ); document.write( "Base: \n" ); document.write( "3x - 1 = 3(4) - 1 = 12 - 1 = 11 m (base)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |