What should be added to `x y+y z+z x` to get ` x y-y z-z x ?` `-2x y-2y z-2z x` (b) `-3x y-y z-z x` `-3x y-3y z-3z x` (d) `2x y+2y z+2z x`

Add: 5x - 8y + 2z, 3z - 4y - 2x, 6y - z - x and 3x - 2z - 3y

If x + y = 2z then (x)/(x-z) +(z)/(y-z) = ?

x+y+z=1 x-2y+3z=2 5x-3y+z=3

2x+y-z=1 x-y+z=2 3x+y-2z=-1

Add 2x - 3y + z , 5y - x + 7z and 3x - y - 6z.

A person travels three equal distances at a speed of x km/hr, y km/hr and z knyhr respectively. What is the average speed for the whole journey? (x y z)/(3(x y+y z+z x)) b. (x y z)/((x y+y z+z x)) c. ((x y+y z+z x))/(x y z) d. (3x y z)/((x y+y z+z x))

x+y-z=1 3x+y-2z=3 x-y-z=-1

The values of x, y, z for the equations x-y+z=1, 2x-y=1, 3x+3y-4z=2 are

Show that : |x y z x^2y^2z^2x^3y^3z^3|=x y z(x-y)(y-z)(z-x)dot