Answer:
a)

b) 18
Explanation:
The unit rate is
.
This means that in 1 hour, you will travel
of a mile.
distance = rate x time
d =
x 3
d =

d =
Divide the numerator and denominator by 3 to simplify.
d =
÷
=

d = rate x time
5 =
t Multiply both sides by

=

t
18 = t