SOLUTION: A 837-mile, 7-hour plane trip was flown at two speeds. For the first part of the trip, the average speed was 111mph. For the remainder of the trip, the average speed was 126 mph. H
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Question 1166102: A 837-mile, 7-hour plane trip was flown at two speeds. For the first part of the trip, the average speed was 111mph. For the remainder of the trip, the average speed was 126 mph. How long did the plane fly at each speed Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! A 837-mile, 7-hour plane trip was flown at two speeds. For the first part of the trip, the average speed was 111mph. For the remainder of the trip, the average speed was 126 mph. How long did the plane fly at each speed
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d = r*t
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t = time flying at 111 mi/hr
837 = 111t + 126*(7-t)
837 = 111t + 882-126t
-45 = -15t
t = 3 hours at 111 mi/hr
4 hours at 126 mi/hr
