![subject](/tpl/images/cats/mat.png)
Mathematics, 05.08.2021 03:20 connermichaela
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 β 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
t=
r
d
β
, where d is the distance, to write a simplified expression for the total time it takes Mai to complete the trip.
4
(
r
+
2
)
(
r
β
2
)
h
o
u
r
s
(r+2)(rβ2)
4
β
hours
4
r
(
r
+
2
)
h
o
u
r
s
(r+2)
4r
β
hours
4
r
(
r
+
2
)
(
r
β
2
)
h
o
u
r
s
(r+2)(rβ2)
4r
β
hours
4
(
r
β
2
)
h
o
u
r
s
(rβ2)
4
β
hours
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Answers: 3
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Mai is kayaking on a river that has a current of 2 miles per hour. If r represents her rate in calm...
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