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**1. Homework Statement**

A car travels along a straight line at a constant speed of 48.5 mi/h for a distance d and then another distance d in the same direction at another constant speed. The average velocity for the entire trip is 32.0 mi/h.

(a) What is the constant speed with which the car moved during the second distance d?

mi/hr

**2. Homework Equations**

avg=(x_1+x_2+...x_2)/n

**3. The Attempt at a Solution**

(48.5+x)/2=32.0

2((48.5+x)/2=32*2

48.5+x=64

(48.5+x)-48.5=64-48.5

x=15.5

This is the only way that I can think of to relate the variables to each other because I don't have a distance or time for any part of in. 15.5 is incorrect, and I'm not looking for an answer, I'm looking for how to relate the variables and find the second constant speed in any situation. Any and all help would be much appreciated. Thank you!