document.write( "Question 1112203: Determine if the equations are perpendicular
\n" ); document.write( "4/27×-y/3=1, 9/4×-y+1=0
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Algebra.Com's Answer #727292 by Alan3354(69443)\"\" \"About 
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Find the slopes.
\n" ); document.write( "If the slopes are negative inverses, they're perpendicular.
\n" ); document.write( "otherwise not.
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