WAEC Further Mathematics 2022 Objective — Question 11

Question 11 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2022 Objective paper, with the correct answer and a full explanation.

If (2 −3; 1 4)(−6; k) = (3; −26), find the value of k.

A. −8
B. −5Correct
C. −4
D. −3

Explanation

From the first row: 2(−6)−3k=3, giving −12−3k=3, so k=−5 (this also satisfies the second row: −6+4(−5)=−26).

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