Answer: 3.
- A 3
- B 4
- C 5
- D 2
Correct answer: A. 3
Explanation: 3x < 12 gives x < 4, so the greatest integer value is 3.
One-variable inequalities use open (excluded) or closed (included) circles on a number line; two-variable inequalities use a dashed (strict) or solid (non-strict) boundary line, with the solution being the entire shaded half-plane on one side of it.
Concept context
Solving linear inequalities in one and two variables algebraically and graphically, and representing solutions on a number line or as a region in a plane.