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Shelly biked 21 miles in 4 hours.a.What is Shelly's average speed in miles per hour?
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Shelly biked 21 miles in 4 hours.a.What is Shelly's average speed in miles per hour?

User NewWorld
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Divide 21 by 4. You get 5.25. BUT convert it to by 60. Then it is 5.15. :)
User EpokK
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