document.write( "Question 620599: Minh walked a total of 4 miles in 75 minutes. It he walked at 3.5 miles per hour for the first 30 minutes, what was his average speed for the rest of the time? \n" ); document.write( "
Algebra.Com's Answer #390276 by rfer(16322)\"\" \"About 
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3.5/2=1.75
\n" ); document.write( "4-1.75=2.25
\n" ); document.write( "2.25/(35/60)=3.9 mph
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