document.write( "Question 1004256: The lines 3x+2y-10=0 is perpendicular to 2x-By+2=0.\r
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document.write( "a.) Find the value of B.
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document.write( "b.) Find the distance from intersection of lines to the origin.
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document.write( "c.) Find the equation of line having a slope of 2 which passes through the intersection of two lines. \n" );
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Algebra.Com's Answer #620767 by Cromlix(4381)![]() ![]() You can put this solution on YOUR website! Hi there, \n" ); document.write( "First sort out equations into \n" ); document.write( "y = mx + c form \n" ); document.write( "3x + 2y - 10 = 0 \n" ); document.write( "2y = -3x + 10 \n" ); document.write( "y = -3/2x + 5 \n" ); document.write( ".......... \n" ); document.write( "2x - By + 2 = 0 \n" ); document.write( "-By = -2x - 2 \n" ); document.write( "By = 2x + 2 \n" ); document.write( ".......... \n" ); document.write( "Lines that are perpendicular \n" ); document.write( "to one another have slopes that \n" ); document.write( "multiply together to give -1 \n" ); document.write( "m1 x m2 = -1 \n" ); document.write( "-3/2 x m2 = -1 \n" ); document.write( "m2 = 2/3 \n" ); document.write( ".......... \n" ); document.write( "So B = 3 \n" ); document.write( "By = 2x + 2 \n" ); document.write( "3y = 2x + 2 \n" ); document.write( "y = 2/3x + 2/3 \n" ); document.write( "........... \n" ); document.write( "Using: \n" ); document.write( "3y - 2x = 2......(1) \n" ); document.write( "2y + 3x = 10.....(2) \n" ); document.write( "Multiply (1) by 3 \n" ); document.write( "Multiply (2) by 2 \n" ); document.write( "9y - 6x = 6......(1) \n" ); document.write( "4y + 6x = 20.....(2) \n" ); document.write( "Add (1) + (2) \n" ); document.write( "13y .....= 26 \n" ); document.write( "y .......= 2 \n" ); document.write( "Substitute y = 2 into \n" ); document.write( "2y + 3x = 10 \n" ); document.write( "2(2) + 3x = 10 \n" ); document.write( "4 + 3x = 10 \n" ); document.write( "3x = 6 \n" ); document.write( "x = 2 \n" ); document.write( "{2,2} Intersection. \n" ); document.write( "B) Distance to (2,2) = 2root2 = 2.83 units (2 decimal places) \n" ); document.write( "C) Using y - b = m(x - a) \n" ); document.write( "with m = 2 \n" ); document.write( "(a,b) = (2,2) \n" ); document.write( "y - 2 = 2(x - 2) \n" ); document.write( "y - 2 = 2x - 4 \n" ); document.write( "y = 2x - 4 + 2 \n" ); document.write( "y = 2x - 2 \n" ); document.write( "Hope this helps :-) \n" ); document.write( " \n" ); document.write( " |