A family is canoeing downstream with current. their speed, Ask an Expert

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A family is canoeing downstream (with current). Their speed relative to the banks of the river averages 2.75 mi/h. During the return trip, they paddle upstream (against the current), averaging 1.5 mi/h relative to the riverbank.

A) Write an equasion for the rate of the canoe downstream.
B) Write an equasion for the rate of the canoe downstream.
C) Solve the system to find the family's paddling speed in still water.
D) Find the speed of the current of the river.

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