Acircular running track is 1/4 of a mile long elena runs this track completing each lap in 1/20 of an hour what is her speed

The speed is equal to

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

x------> the distance in miles

y-----> the time in hours

s----> the speed in mph

so

In this problem we have

substitute

answer: b.

step-by-step explanation:

it is b. cause the equations are put in the right category