gloria jones drives 15mi to work in about half an hour. write a rate of travel in miles per hour. Why do you think this rate is called her average speed?

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15miles in .5 hours. Basically, mph is how far she would have gone at that same rate in 1 hour. so you want to make the denominator 1. so 15m/.5hr = 15m/.5hr *2/2 (1) = 30m/1hr = 30m/hr

it's called her average speed because she didn't necessarily drive the same speed the whole time - but we since she drove 30m/hr, we know that at that rate, that's how fast she was going to whole time in order to travel that distance

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