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JAMB Mathematics 2007 Objective — Question 24

Question 24 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

If the lines 2y-kx+2=0 and y+x-k/2=0 intersect at (1,2), find the value of k.

A. -1
B. -2Correct
C. -3
D. -4

Explanation

Substituting x=1, y=2 into k(-x+1/2) = -y+x-2 and solving gives k = -2.

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