document.write( "Question 969574: If two lines are perpendicular, then their slopes MUST BE _______________.
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Algebra.Com's Answer #592412 by amarjeeth123(570)\"\" \"About 
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If two lines are perpendicular, then their slopes MUST BE having a product of -1.
\n" ); document.write( "If one line has a slope of 2/3, then every line perpendicular to it has a slope of -3/2.
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