SOLUTION: Mai is kayaking on a river that has a current of 2 miles per hour. If r represents her rate in calm water, then r+2 represents her rate with the current, and r-2 represents her rat

Question 702780: Mai is kayaking on a river that has a current of 2 miles per hour. If r represents her rate in calm water, then r+2 represents her rate with the current, and r-2 represents her rate against the current. Mai kayaks 2 miles downstream and then back to her starting point. Use the formula for time, t=d/r, where d is the distance, to write a simplified expression for the total time it takes Mai to complete the trip.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the total time for the trip

given: mi

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The rate of the current is mi/hr
Equation for going upstream:

Equation for going downstream:

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