The product of `x\ a n d\ y` is decreased by 4 is written as `4-x y` (b) `x\ (y-4)` (c) `x y-4` (d) `x y+4`

The product of x\ a n d\ y is decreased by 4 is written as (a) 4-x y (b) x\ (y-4) (c) x y-4 (d) x y+4

The product of x and y is decreased by 4 is written as 4-xy(b)x(y-4)xy-4(d)xy+4

The quotient of x\ b y\ y added to the product of x\ a n d\ y is written as (a) x/y+x y (b) y/x+\ x y (c) (x y+x)/y (d) (x y+y)/x

Find the product \ 3y(x y+y^2) and find its value for x=4\ a n d\ y=5.

The equation of common tangent to the curves y^2 =4x and xy=2 is (A) x+2y-4=0 (B) x+2y+4=0 (C) x-2y+4=0 (D) x-2y-4=0

The equation of common tangent to the curves y^2 =4x and xy=2 is (A) x+2y-4=0 (B) x+2y+4=0 (C) x-2y+4=0 (D) x-2y-4=0

The equation of common tangent to the curves y^2 =4x and xy=2 is (A) x+2y-4=0 (B) x+2y+4=0 (C) x-2y+4=0 (D) x-2y-4=0

The equation to a pair of opposite sides of a parallelogram are x^2-5x+6=0 and y^2-6y+5=0 . The equations to its diagonals are (a) x+4y=13 ,y=4x-7 (b) 4x+y=13 ,4y=x-7 (c) 4x+y=13 ,y=4x-7 (d) y-4x=13 ,y+4x-7

What is the slope of following straight lines corresponding to equations (a) y= 2x (b) y = - 6x (c) y=4x +2 (d) y = 6x -4

If x+y=4\ a n d\ x y=2, find the values of x^2+y^2