10. The value of k for which the system of equations kx-y=2 6x-2y=3 Has a unique solution, is a)=3b)? 3c) ? 0d)=0 11. The value of k for which the system of equations 2x+3y=5 4x+ky=10 Has infinite number of solutions, is a) 1b) 3c) 6d) 0 12. The value of k for which the system of equations x+2y-3=0 and 5x+ ky+7=0 has no solution is a) 10b) 6c) 3`d) 1 13. The value of k for which the system of equations 3x+5y=0 and kx+10y=0 has a non zero solution, is a) 0b) 2c)6d)8 14. If the system of equations 2x+3y=7 (a+b)x + (2a-b)y=21 Has infinitely many solutions, then )a=1, b=5 b)a=5, b=1 c)a=-1, b=5 d)a=5, b=-1 15. If the system of equations 3x+y=1 (2k-1) x + (k-1) y=2k+1 Is inconsistent, then k= a)1b)0c)-1d)2 16. If am? bl, then the system of equations ax+by=c lx+my=n a) Has a unique solutionb) has no solution c) Has infinitely many solutionsd) may or may not have a solution 17. If 2x-3y=7 and (a+b)x-(a+b-3)y=4a+b represent coincident lines, then a & b satisfy the equation a) a+5b=0b)5a+b=0c)a-5b=0d)5a-b=0 18. The pair of linear equations 3x+2y=5; 2x-3y=7 have how many solutions:- (A) One solution (B) Two solutions C) Many Solutions (D) No solution 19. When a is not equal to 0 , b=0 and c=0 then the equation ax=0or x=0 is :- (A) X-axis (B) y-axis (C)a line parallel to x-axis (D) a line parallel to y-axis 20. The graph y=3x is a _____________________ (A) X-axis (B)y-axis (C) A line parallel to x-axis (D) A line passing through origin 21. The number of solutions of lines that are coincident:- (A) 1 (B) Infinite C)No Solution (D) 2 Solutions 22. The value of k for which the system of equations X+2y=5 3x+ky+15=0 Has no solution is a)6b)-6c)3/2d)None 23. Equation of degree 1 is known as :- (A)Linear Equations (B) Quadratic Equation (C)Cubic Equation (D) None Of Them 24. Solve the system by the method of substitution 2x + y = 6 -x + y = 0 a) (2,2)b) (4,2)c) (2,3)d) (1,0) 25. Solve the system by the method of substitution -x + 2y = 2 3x + y = 15 a) (3,5)b) (2, 4)c) (4, 3)d) (1, 2)