Answer: (4, 3).
- A (4, 3)
- B (3, 4)
- C (6, 0)
- D (0, 5)
Correct answer: A. (4, 3)
Explanation: Subtracting x + 2y = 10 from 3x + 2y = 18 gives 2x = 8, so x = 4. Then 4 + 2y = 10 gives y = 3. The intersection point is (4, 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.