If `x-y=1` and `x^2+y^2=41` , then the value of `x+y` will be (a) 5 or 4 (b) `-5` or `-4` (c) `+-9` (d) `+-1`

If 2x+y=5 and 3x-4y=2, then the value of 2xy is (a) 4 (b) 6 (c) 8 (d) 10

If [[2x,1],[5,x+2y]]=[[4,1],[5,0]] then find the value of x+y.

2x+3y+4z=9,4x+9y+3z=10,5x+10y+5z=1 then the value of x is

If 2x+y=17;y+2z=15 and x+y=9 then what is the value of 4x+3y+z?(a)41 (b) 43(c)45 (d) 55 (e) None of these

If x=a,y=b is the solution of the equations x-y=2 and x+y=4 then the values of a and b are respectively, a)3 and 1 b)-1 and -3 c)6 and 4 d)5 and 3

If 4x^(2) +py^(2) = 45 and x ^(2) - 4y^(2) = 5 cut orthogonally , then the value of p is : a) (1)/(9) b) (1)/(3) c)3 d)9

If the mean of the following distribution is 2.6, then the value of y is Variable (x) : 1 2 3 4 5 Frequency (y) : 4 5 y 1 2 (a) 3 (b) 8 (c) 13 (d) 24

If the mean of the following distribution is 2.6, then the value of y is Variable (x) : 1 2 3 4 5 Frequency (y) : 4 5 y 1 2 (a) 3 (b) 8 (c) 13 (d) 24

If [[1,2],[3,1]][[x],[y]] = [[5],[5]] , then value of x+y is (A) 4 (B) 2 (C) 0 (D) 3

If [[1,2],[3,1]][[x],[y]] = [[5],[5]] , then value of x+y is (A) 4 (B) 2 (C) 0 (D) 3