nt - - - - - - - - - (B) oin 7. Which of the following pair of linear equations has x = 2 & y -1 as its unique solution? (A) 2x - 3y - 7 = 0, 4x - 6y + 14 = 0 (B) 2x - 3y - 7 = 0, 6x - 2y + 21 = 0 (C) 2x - 3y - 7 = 0,3x – 2y - 8 = 0 (D) 2x - 3y - 7 = 0, 3x - 2y + 8 = 0 8. The point of intersection of lines 3x - 2y + 7 = 0 and 2x + 3y - 4 = 0 is (A) (3, 1) (B) (-4,4) (C) (1, -2) (D) (-1,2) 9. The points (7, 2) and (-1,0) lie on a line (A) 7y = 3x - 7 (B) 4y = x + 1 (C) y=7y +7 (D) x = 4y +1 10. Which of the following is not a solution of the pair of equations 3x - 2y = 4 and 6x - 4y = 8. (A) x = 2 and y = 1(B) x = 4 and y=4 (C) x=6 and y=7 (D) x = 5 and y = 2 ( 11. Value of k for the equations (k - 1) x - y = 5 and (k + 1) x + (1 - k) y = 3k + 1 have infinite num solutions is (A) 3 (B) 4 (C)-4 (D)-3 b 12. Y = a + -, a and b are real numbers if y=1, when x = -1 and y = 5, when x = -5 then a + b is equ (A) - 1 (B) O (C) 11 (D) 10 13. The pair of equations x = a and y = b graphically represents lines which are (A) Parallel (B) Intersecting at (b, a) (C) Coincident (D) Intersecting at (a, b) 14. In the given graph, the solutions of the two equations is (A) (0, 3) (B) (3,0) (C) (1,3) (D) (5, 1) x x' Y 6 5 11 7 12 4 3 2 12 X 3 Y!
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Option C is the correct answer for the first question.
To get the answers of all questions, please ask them separately.
Every thing is not understood here.
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