The expression D over T can be used to find the average speed of an object that travels a distance D in time T what is a cars average speed if it travels 145 miles in 2.5 hours

So, you basically plug the values into the formula you have been given. D divided by T gives you the average speed.

We know the distance D is 145 miles and the Time T is 2.5 hours.

So, 145/2.5=58

Therefore, the cars average speed was 58 miles / hour