Answer:
24
Step-by-step explanation:
3*8 = 24
Answer:
12 students
Step-by-step explanation:
Given

Required
Determine the number of students that eat lunch once a week
In Sets;
If out of 9, at least 7 eats one a week then
9 - 7 eats lunch once a week

<em>In other words;</em>
2 out of 9 students eat lunch once a week
Number of students in this category is then calculated as thus;




It actualy gives you the minimum of the function
it helps you because fonding the minimum y will give you the range