See how the parentheses get cleared when each term inside the parentheses is multiplied by the factor outside. The average speed is 54 miles per hour. Solving unit price problem.
Check to see what the units on your final number should be.
How do I calculate a rate. Speed is a rate that is calculated by dividing distance by time. R rate of speed d distance t time Or you can use d rt for solving distance and tdr for time. A rate is a ratio comparing quantities of different items.