Question

Tinley is training to run a half-marathon. She sets a pace so that every mile takes 7 minutes. Write an equation for the amount of time, t, it takes Tinley to run m miles.

Answer 1

On Khan Academy there is two parts to this for the second part it would be:

m t

4 28

6 42

8 56

10 70

Answer 2

By definition, it is known that distance equals speed by time.
We have then
d = v * t
Clearing t, we have:
t = (d) / (v)
Then, we have that she runs at a speed of
v = 1/7 mi / min
Substituting the values we have
t = (d) / (v)
t = (m) / ((1/7))
Rewriting
t = 7m
answer
an equation for the amount of time, t, it takes Tinley to run m miles is
t = 7m