Can you guys help me my homework , i'm not pretty sure how to do it

You travel 5miles downstream in a kayak at a speed ofr

rmiles per hour. You turn around and travel 6miles upstream at a speed of0.6r

0.6rmiles per hour. Finally, you turn around and return to your original starting point at a speed ofr+1

r+1miles per hour.

Write model in simplified form for the total timet

t(in hours) of the trip.

How long does your trip take whenr

ris 3miles per hour?

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