Question 674412
distance  = rate x time
Her rate is 7 and 1/2 miles per hour
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D = ( 7 + 1/2 miles/hr ) x ( 3 hrs )
D = 21 + 3/2 miles
D = 22 + 1/2 miles
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D = ( 7 + 1/2  miles/hr ) x 2/3 hr
D = 14/3 + 2/6 miles
D = 14/3 + 1/3 miles
D = 4 + 2/3 + 1/3 miles
D = 5 miles