Let l represent number of miles ran by Pierre each day.
We have been given that Pierre runs the same around a track each day 4 days a week. So number of laps ran is 4 days would be .
We are also told that he runs a total of 12 miles each week and it takes 8 laps of the track to equal a mile. So number of laps in 12 miles would be 8 times 12.
Now, we will equate total laps ran in 4 days by 8 times 12 as:
Therefore, we can use the equation to find how many laps Pierre runs each day.
Her brother joe made $52.08. First you need to make the percent into a decimal, like this 86% => .86. Then multiply .86 to $28. After that add what you got to $28.