document.write( "Question 1100825: you can bike a mountain at a speed of 2.5 miles per hours lower than your speed coming down the mountain. If it takes you six hours to bike the mountain but only 135 minutes to come down the mountain, what is your speed coming down? \n" ); document.write( "

Algebra.Com's Answer #715356 by jorel1380(3719) $\"\"$ $\"About$

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Let n be your speed going down the mountain. Then your speed going up is n-2.5. So:
\n" ); document.write( "6(n-2.5)=2.25n
\n" ); document.write( "6n-15=2.25n
\n" ); document.write( "3.75n=15
\n" ); document.write( "n=4 mph down the mountain
\n" ); document.write( "n-2.5=1.5 mph up the mountain
\n" ); document.write( "☺☺☺☺ \n" ); document.write( "

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