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Mathematics 14 Online
OpenStudy (anonymous):

.

OpenStudy (anonymous):

5 mph ------- 4 hours * 6 mph = 24 miles 24 miles/6 hours = 4 mph Since it took six hours with the current and four hours against the current: Let x represent the boat in still water Let y represent the current x+ y = 6mph x -y = 4mph Solve for x by substitution: y = 6 mph - x x - (6 mph - x) = 4 mph 2x - 6 mph = 4 mph 2x = 10 mph x = 5 mph

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