document.write( "Question 995226: Which pair of equations represents two perpendicular lines?
\n" ); document.write( "-3x+2y=10 and 3y=-2x+12
\n" ); document.write( "7x+4y=20 and y-3=-4/7x
\n" ); document.write( "x=4y+4 and 4x+4y=4
\n" ); document.write( "2x-5y=45 and y-5/2x=-9 \n" ); document.write( "
Algebra.Com's Answer #614017 by Alan3354(69443)\"\" \"About 
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Which pair of equations represents two perpendicular lines?
\n" ); document.write( "-3x+2y=10 and 3y=-2x+12
\n" ); document.write( "7x+4y=20 and y-3=-4/7x
\n" ); document.write( "x=4y+4 and 4x+4y=4
\n" ); document.write( "2x-5y=45 and y-5/2x=-9
\n" ); document.write( "=================
\n" ); document.write( "Find the slope of each eqn.
\n" ); document.write( "The slopes of 2 perpendicular lines will be negative inverses.
\n" ); document.write( "-3x+2y=10
\n" ); document.write( "Put in slope-intercept form y = mx + b (solve for y)
\n" ); document.write( "y = (3/2)x + 5
\n" ); document.write( "m is the slope.
\n" ); document.write( "m1 = 3/2
\n" ); document.write( "-----
\n" ); document.write( "3y=-2x+12
\n" ); document.write( "y = (-2/3)x + 4
\n" ); document.write( "m2 = -2/3
\n" ); document.write( "m1 = -1/m2 --> perpendicular.
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\n" ); document.write( "Do the others the same way.
\n" ); document.write( " \n" ); document.write( "
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