Given that `x^2 + y^2 = 14x +6y +6` , find the largest possible value of the expression `E=3x+4y`.

If x = 1 , y = 2 find the values of the following expressions: 4x- 6y +5

If x ^(2) + y^(2) - 14 x - 6y - 6=0, then the maximum possible value of 3x + 4y is (where (x,y) is a point on the given curve)

if x^(2)+y^(2)-4x-6y-3=0, then minimum possible value of the expression 16[(1)/((x-2)^(2))+(1)/((y-3)^(2))] is equal to:

If 9x^2+25 y^2=181 and x y=-6, find the value of 3x+5y

If 3x+2y=12 and x y=6 , find the value of 9x^2+4y^2

If 3x+2y=12 and x y=6, find the value of 9x^2+4y^2

Solve 3x + 2y = 14 and - x + 4y = 7 and hence find the value of k for which 3x = 2ky + 6.