Answer: x <= 4.
- A x >= 4
- B x <= 4
- C x >= -4
- D x <= -4
Correct answer: B. x <= 4
Explanation: -3x >= -12. Dividing by -3 flips the sign: x <= 4.
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.