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27 January, 04:38

Shelly biked 21 miles in 4 hours (part A) what is Shelly's average speed in miles per hour (part B) at the same rate how many hours will it take Shelly to bike 42 miles.

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  1. 27 January, 04:57
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    A) Divide total miles by total time:

    21 miles / 4 hours = 5.25 miles per hour.

    B) Divide miles by miles per hour:

    42 miles / 5.25 miles per hour = 8 hours.
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