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A car travels 120.0 miles at 40.0 mph followed by 140.0 miles at 70.0 mph. A) B) What is its average speed for the trip? How long would the car have to travel at 70.0 mph to make the average speed for the trip equal 60.0 mph?

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iven cedo, 2 190十140 しナ虫 Ve. 40 52 mph oues。 of 구。

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