Algebra-1

Question Analysis
This question tests the student's understanding of unit rates. The problem involves finding the speed of a car in miles per hour when the total distance traveled and the total time taken are given.

Key Concept Explanation
A unit rate is a rate in which the second term is 1. In this case, the unit rate of the car's speed is the number of miles traveled per hour. To find the unit rate, we divide the total distance by the total time.

Step-by-step Solution
1. Identify the total distance: 180 miles
2. Identify the total time: 9 hours
3. Calculate the unit rate:

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