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26-10-2016
Mathematics

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A mine elevator was at a depth of -120 feet. After 15 seconds, the mine elevator was at a depth of -30 feet. Which expression shows how to find the speed of the mine elevator in feet per second?

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Аноним Аноним

26-10-2016

-120 + -30 = 90. 90/15 = 6
Answer ; 6mph

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