At her auto shop, Mai does oil changes and tire changes. The table below shows how long (in minutes) it takes her to complete each of these services.
Time to complete each service (in minutes)
Oil change:9
Tire change:15
Let x be the number of oil changes she does.
let y be the number of tire changes she does.
Suppose Mai works for at most 60 minutes. Using the values and variables given, write an inequality describing this.
The total time Mai spends doing oil changes can be represented by 9x. Similarly, the total time she spends doing tire changes can be represented by 15y.
Since the total time Mai works is at most 60 minutes, the inequality is:
9x + 15y ≤ 60