Write an inequality to describe the number of students in each homeroom: there is limit of 30 students for each homeroom.

To write the inequality, the first thing to do is name the variables that will be present.
 We have then that:
 x = number of students per room
 The inequation is:
 x <= 30
 
 an inequality to describe the number of students in each homeroom is
 x <= 30