SOLUTION: caroline drove 350 miles to her grandmothers house. the trip took her 5 1\4 hours. what was her average speed in miles per hour? i know distance over time gives you average speed b

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Question 900597: caroline drove 350 miles to her grandmothers house. the trip took her 5 1\4 hours. what was her average speed in miles per hour? i know distance over time gives you average speed but should i break it down to minutes first then revery back
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D for rate time distance.

You have R=unknown, something for which to solve;
T=5%261%2F4 hours;
D=350 miles.

Keep your calculations in miles per hour.
R=D%2FT
R=350%2F%285%261%2F4%29 miles per hour

You have no reason to convert anything into minutes. Your given values are in miles and in hours, and a very common unit for travel rates is MILES per HOUR.