Mr. Richardson is driving to a town 85 miles away. He drives 35 miles per hour for 2 hours before stopping for lunch. He drives 6 more miles and stops for gas. Which expression shows how many miles, m, Mr. Richardson has left to drive?
85 - (35 * 2) - 6 = m
Therefore, the expression is:
85 - 70 - 6 = m
m = 9
So, Mr. Richardson has 9 miles left to drive.