ECZ 2014 · O-Level Paper 2 · Question 1 — Algebra
Question from ECZ 2014 · O-Level Paper 2 · Question 1
(a) Evaluate 1 23 - 1 23 × 14.[2]
Verified working — step 1
Multiplication comes before subtraction.(b) Solve the equation 5x - 8 - 3(x + 1) = -7.[2]
Verified working — step 1
Expand the bracket: -3(x + 1) = -3x - 3.(c) Simplify 5(2y - 3) - 2(5 - 2y).[2]
Verified working — step 1
Expand both brackets.(d) Mataya's digital camera stores images on a memory card of capacity 512 units. Given that two thirds of the memory card is used, calculate the number of unused units, giving your answer correct to 2 decimal places.[2]
Verified working — step 1
Two thirds is used, so one third is unused.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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question