document.write( "Question 367329: decide whether the pair pf lines are parallel,perpendicular,or neither\r
\n" ); document.write( "\n" ); document.write( "5x+3y=7
\n" ); document.write( "3x-5y=5 \n" ); document.write( "
Algebra.Com's Answer #261832 by tutorcecilia(2152)\"\" \"About 
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First, I would define the rules: Parallel lines have the same slope; perpendicular lines have \"egative reciprocal\"slopes. Next, convert each line into the slope-intercpt formate y-mx+b.
\n" ); document.write( "5x+3y=7
\n" ); document.write( "3y=-5x+7
\n" ); document.write( "3y/3=-5/3x+7/3
\n" ); document.write( "So the slope is -5/3
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\n" ); document.write( "3x-5y=5
\n" ); document.write( "-5y=-3x+5
\n" ); document.write( "-5y/-5=(-3/-5x)-5/5
\n" ); document.write( "y=3/5x-1
\n" ); document.write( "so, the slope is 3/5
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\n" ); document.write( "Since the slopes are the \"negative reciprocals\" of each other, they are __________________?\r
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