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Mathematics 16 Online
OpenStudy (anonymous):

what is the average,s, of 80 and 130 mph

Directrix (directrix):

Is this an average speed problem such as the following: A vehicle travels at 80 mph on a trip and at 130 mph on return trip. What was its average speed for the entire trip? If so, the average speed is [2* (80)*130] / [80 + 130] = 99.05 mph (approx) http://www.beatthegmat.com/two-methods-to-calculate-total-average-speed-t6749.html

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