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
