Chap7 Section8

# Elementary and Intermediate Algebra: Graphs & Models (3rd Edition)

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744 Chapter 7 Rational Functions Version: Fall 2007 17. Jacob is canoeing in a river with a 5 mph current. Suppose that he can ca- noe 4 miles upstream in the same amount of time as it takes him to canoe 8 miles downstream. Find the speed (mph) of Jacob’s canoe in still water. 18. The speed of a freight train is 16 mph slower than the speed of a passenger train. The passenger train travels 518 miles in the same time that the freight train travels 406 miles. Find the speed of the freight train. 19. The speed of a freight train is 20 mph slower than the speed of a passenger train. The passenger train travels 440 miles in the same time that the freight train travels 280 miles. Find the speed of the freight train.
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