Posted by Astrid on Tuesday, April 22, 2008 at 4:57pm.
Sean and Barry are practicing in a 30mile bike race. Sean averages 20 miles per hour and Barry averages 15 miles per hour. Howm many miles will Barry be from the finish line when Sean finishes the race?

algebra  Ms. Sue, Tuesday, April 22, 2008 at 5:08pm
At 20 miles per hour, Sean should finish the race in 1.5 hours.
30/20 = 1.5
After 1.5 hours, Barry should have ridden 22.5 miles, making him 7.5 miles from the finish line.
15 miles in 1 hour and 7.5 miles in 0.5 hours.
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