Question

A canoe travels 5 miles downstream at rate r, and then 5 miles back upstream at
70% of its downstream rate. Write and simplify a rational expression for the total
time of the trip.

Answer 1

Answer:

See below

Step-by-step explanation:

distance / rate = time

d/r   +  d/(.7r) =   total time

5 /r   + 5 /(.7r) = time

35/7r + 50/7r  = time

85/7r = time