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Road Trip: A story problem on duration, speed, and distance

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Harry and Irene decided to take a road trip. The first 45 miles of the drive is pretty easy, while the last 76 miles of the drive is filled with curves. The drove at an average of 7 miles per hour faster for the first 45 miles of the trip. The entire trip took 4 hours. How fast were Harry and Irene driving for the first 45 miles of the trip?

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Solution Summary

Detailed solution is in the attached PDF. This is a detailed, step-by-step example of creating a formula for a speed and duration story problem and solving it.

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