It takes you 4 hours to driving 180 miles. Explain how to use mental math to find your average speed. Then, Explain how your method is related to the formula d=rt

To find your average speed, divide 180 by 4 which is 45.

Formula:

Plug the number into the equation

180 is d (distance)

4 is t (time

So it would be 180=r•4

1) get r by itself so divide 4 to both sides

2) 180/4 = r

3) 45 = r