Question

Number of minutes left in a 45 minute class after m minutes have gone by

Answer 1

y = 45 - m

Explanation:

Let y represent the number of minutes left in class. M is the number of minutes that have gone by, and there is 45 minutes in a class. To find how many minutes are left, all you have to do is subtract the minutes in a class by the amount of time that has already passed (45 - m). Just put that equal to y and that is your answer.

y = 45 - m