If the Sanderson family completed their 385 mi trip in 7hr, what was their average speed?- write and solve an equation

1. Use the average speed formula:

\text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}}

2. Plug in the given values:

\text{Average Speed} = \frac{385 \text{ miles}}{7 \text{ hours}}

3. Divide the total distance by the total time to find the average speed:

\text{Average Speed} = \frac{385}{7}

4. Calculate the result:

\text{Average Speed} = 55 \text{ mph}

Finally, the Sanderson family's average speed was 55 \text{ mph}.