a round trip car ride took 12 hours. the first half of the trip took 7 hours at a rate of 45 miles per hour. what was the average rate of speed on the return trip?

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I have no clue

To find the average rate of speed on the return trip, we need to determine the time and distance of the second half of the trip.

Since the total round trip took 12 hours and the first half took 7 hours, the second half of the trip would have taken the remaining time:
12 hours - 7 hours = 5 hours.

We know the speed of the car on the first half was 45 miles per hour. To find the distance traveled on the first half, we can use the formula:

distance = speed * time

distance = 45 miles/hour * 7 hours = 315 miles.

Since the round trip covers the same distance, the second half of the trip also covers 315 miles. Therefore, the average rate of speed on the return trip can be calculated using the formula:

average speed = total distance / total time.

average speed = 315 miles / 5 hours = 63 miles per hour.

So, the average rate of speed on the return trip was 63 miles per hour.