ECZ 2020 · O-Level Paper 1 — Linear Programming
Write the three inequalities that define the unshaded region R.
- A. x < 3, x + y ≥ 3, 2x + y ≤ 6
- B. x > 3, x + y ≥ 3, 2x + y ≤ 6
- C. x < 3, x + y ≤ 3, 2x + y ≥ 6
- D. x < 3, x + y ≥ 3, 2x + y ≥ 6
Verified working — step 1
The three boundary lines meet at (3, 0): the dashed vertical line x = 3 (R is to its left, x < 3), the line x + y = 3 (R is above it, x + y ≥ 3), and the line 2x + y = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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