document.write( "Question 225949: Could you help me with this problem please?\r
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document.write( "Find the area of a triangle formed by the x-axis, the line y=-6x+60, and the line 3x-4y=-24. \n" );
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Algebra.Com's Answer #168417 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Find the area of a triangle formed by the x-axis, the line y=-6x+60, and the line 3x-4y=-24. \n" ); document.write( "------------ \n" ); document.write( "Find where the 2 lines intersect. \n" ); document.write( "y = -6x+60 \n" ); document.write( "3x-4y = -24 \n" ); document.write( "Sub for y in 2nd eqn \n" ); document.write( "3x - 4(-6x+60) = -24 \n" ); document.write( "3x + 24x-240 = -24 \n" ); document.write( "27x = 216 \n" ); document.write( "x = 8 \n" ); document.write( "--------- \n" ); document.write( "y = -6x+60 = 12 \n" ); document.write( "--> (8,12) \n" ); document.write( "----------------- \n" ); document.write( "Find the x-intercepts of the 2 lines by setting y=0. \n" ); document.write( "y = -6x+60 \n" ); document.write( "0 = -6x+60 \n" ); document.write( "x = 10 \n" ); document.write( "---------- \n" ); document.write( "3x-4y = -24 \n" ); document.write( "3x = -24 \n" ); document.write( "x = -8 \n" ); document.write( "-------- \n" ); document.write( "The base of the triangle is from x = -8 to x = 10, = 18 units. \n" ); document.write( "The height is the y value of the intersection, = 12 \n" ); document.write( "Area = b*h/2 = 18*12/2 \n" ); document.write( "Area = 108 sq units. \n" ); document.write( " |