Problema Solution
At Nicole's auto shop, it takes her 9 minutes to do an oil change and 15 minutes to do a tire change. Let X be the number of oil changes she does. Let Y be the number of tire changes she does.
Using the values and variables given, write an inequality describing how many oil changes and tire changes Nicole can do in less than 3 Hours (180 minutes)
Answer provided by our tutors
9*x + 15*y <= 180 divide both sides by 3
3x + 5y <= 60