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Mathematics, 14.01.2021 02:30 kiarajack456

9) Martin was jogging to school at a speed of 10 mph. Unfortunately, when he was halfway there, he sprained his ankle and his mom had
to give him a ride the rest of the way at 40 mph. After school Martin
rode the bus home at an average speed of 20 mph. What was
Martin's average speed on his round trip to school and back?

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9) Martin was jogging to school at a speed of 10 mph. Unfortunately, when he was halfway there, he...
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