Posted by Anonymous on Thursday, February 3, 2011 at 10:44pm.
p4=9+p

algebra  Anonymous, Thursday, February 3, 2011 at 11:03pm
At 8:00 am, a freight train passes a station and begins traveling east at an average speed of 40 miles per hour. Half an hour later, a passenger train passes the same station and begins traveling east on a parallel track at an average speed of 50 miles per hour. At what time will the passenger train catch up with the freight train?
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