document.write( "Question 979773: are the line (-20,5)and (-4,7) and the line through (5,-5) and (7,4) parallel, perpendicular or neither? \n" ); document.write( "
Algebra.Com's Answer #601026 by Alan3354(69443)\"\" \"About 
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are the line (-20,5)and (-4,7) and the line through (5,-5) and (7,4) parallel, perpendicular or neither?
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\n" ); document.write( "Find the slope of each line, m1 & m2.
\n" ); document.write( "If m1 = m2 --> parallel (or coincident)
\n" ); document.write( "If m1 = -m2 --> perpendicular
\n" ); document.write( "o/w neither.
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