Let `x+y=1` and `x^3+y^3=19` , then the value of `x^2+y^2` is equal to 9 (b) 19 (c) 39 (d) 13

3x+y=19 and x+3y=1 then find the value of 2x+2y

If 5x+y=19 and x-3y=7 , then x+y=

Let x , y be two variables and x >0, x y=1 , then minimum value of x+y is (a) 1 (b) 2 (c) 2 1/2 (d) 3 1/3

Let x ,\ y be two variables and x >0,\ \ x y=1 , then minimum value of x+y is (a) 1 (b) 2 (c) 2 1/2 (d) 3 1/3

If 2x + y = 23 and 4x - y = 19, find the values of x - 3y and 5y - 2x.

If 3x-4y+z=7; 2x-z+3y=19 ; x+2y+2z=24 , then what is the value of z ? (a) 4 (b) 5 (c) 6 (d) 8

If [2x+y,4x,5x-7 4x]=[7 7y-13 y x+6] , then the value of x+y is x=3 , y=1 (b) x=2 , y=3 (c) x=2 , y=4 (d) x=3 , y=3

If parabolas y^2=lambdax and 25[(x-3)^2+(y+2)^2]=(3x-4y-2)^2 are equal, then the value of lambda is (a) 9 (b) 3 (c) 7 (d) 6

If parabolas y^2=lambdax and 25[(x-3)^2+(y+2)^2]=(3x-4y-2)^2 are equal, then the value of lambda is (a)9 (b) 3 (c) 7 (d) 6