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 8x + 5y = 9, 3x + 2y = 4, then the value of x and y are

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

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

If 4x+3y=18xy and 2x-5y+4xy=0 then the values of x and y will be respectively -(1)/(2) and -(1)/(3)(b)-1 and -3(c)(1)/(2) and (1)/(3) (d) (1)/(4) and (1)/(3)

If 3x-5y=5 and (x)/(x+y)=(5)/(7), then what is the value of 2xy is (a) 3(b)4(c)6(d)9(e) None of these

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=9+4sqrt(5) and xy=1 , then find the value of ((1)/(x^(2))+(1)/(y^(2))) .

Let ((x)/(2)-1,(y)/(9)+1) = (2,1) ; then the values of x and y respectively are a) 3, 5 b) 6,0 c) 5, 3 d) 0, 6

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 2x+3y=5 and 3x+2y=10 then x-y= (a) 3 (b) 4 (c) 5 (d) 6