Answer:
Inequality form: m<7
Interval notation: (-infinity sign, 7)
Step-by-step explanation:
3(x-6)(x+2)
hope this helps
Answer: 6 students
What we know:
Students: 24
Students who play checkers: 
Students who also play sudoku:
of the 
24 ÷ 3 = 8, so 8 × 2 = 16 (students who play checkers)
× 2 = 
So the answer is,
6 students play both checkers and sudoku
You need to explain to us what to do or else nobody will understand what your trying to ask for.