document.write( "Question 368769: 2x+4y=-10;(4,2)
\n" ); document.write( "write equation of a line that is perpendicular to the given line and that passes through the given point
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Algebra.Com's Answer #262841 by robertb(5830)\"\" \"About 
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The unknown line would have the form
\n" ); document.write( "4x-2y = c, where c is an undetermined constant. To find c use the coordinates of the given point:
\n" ); document.write( "4*4 - 2*2 = 16 - 4 = 12.
\n" ); document.write( "Therefore the equation of the line is
\n" ); document.write( "4x-2y = 12.
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