Answer:

Step-by-step explanation:
Here, a be the total amount of student council activities,
Since, a student must attend at least 3/4 of the activities,
Thus, the least number number of activities a student must attend = 3/4 of a

Given,
Joey attends 15 of the activities to remains on the student council,
Also, his activity must be greater than
.

Which is the required inequality.