Answer: x ≥ 3.
- A x ≥ 3
- B x ≤ 3
- C x ≥ 9
- D x ≤ 9
Correct answer: A. x ≥ 3
Explanation: Dividing both sides by 3 gives x ≥ 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.