Question 1121596
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They traveled for x hours at 35mph and 2x hours at 52mph.  Since distance is rate times time, the total distance they traveled was<br>
35(x)+52(2x)<br>
Write and solve the equation that says that total distance was 104.25 miles.<br>
That will give you x, the amount of time they traveled at 35mph after lunch.  From that you can get the answers to all the questions.