document.write( "Question 527922: i am having trouble understanding why a staircase with an 8.5\" riser & 9\" treads has a slope of 17/18. i know m = rise/treads = rise/run = (y2-y1)/(x2-x1) but i keep getting zero?? \n" ); document.write( "
Algebra.Com's Answer #349113 by Alan3354(69443)\"\" \"About 
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The rise is 8.5, the run is 9
\n" ); document.write( "8.5/9 = 17/18
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