So to find this we divide 3 by 1/2 and get 6. So, she is now only at 1/6 of her original time.1/6 is equal to .1666, and to the nearest percent that would be 17%. hope this helps and its not too late!
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The answer is 2 because both can be dived them by two
3(-2) -(1) -3(-2)
= -6 -1 +6 = -1
To find the answer, divide 7.2 miles by 3 hrs, this would get you to answer B, 2.4 miles per hour