Question

Quadratic equation mcq. If answered all correctly you will be marked brainliest and no spamming.

1-The solution of the equations x+y=14 and x–y=4 is
(a) x = 9 and y = 5 (b) x = 5 and y = 9 (c) x = 7 and y = 7 (d) x = 10 and y = 4

2-The value of k for which the system of equations kx–y=2 and 6x–2y=3 has a unique solution is
(a) k = – 3 (b) k ≠ – 3 (c) k = 0 (d) k ≠ 0

3-The solution of the equations 0.4x + 0.3y = 1.7 and 0.7x – 0.2y = 0.8 is
(a) x = 1 and y = 2 (b) x = 2 and y = 3 (c) x = 3 and y = 4 (d) x = 5 and y = 4

4-If the pair of equations 2x+3y=7 and kx+9y=12 have no solution, then the value of k is:
(a) 2/3 (b) – 3 (c) 3 (d) 3/2

Answer 1

Mate here is your answer

1 ) Option A

2) mate my answer is 3 but I can't find my anwer in your option which you gave

3) Option B

4) mate my answer is 6 but in your options there is no option of 6

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