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29 October, 18:48

If it would take Billy an hour to race over to his girlfriend's house and two hours if he went 20 mph slower, how far away does Billy's girlfriend live?

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  1. 29 October, 18:55
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    40 miles.

    Step-by-step explanation:

    You are doubling the amount of time it takes when it's - 20 mph, so multiply 20 by 2 to get 40 miles.
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