If `[[x+y+z],[x+y],[y+z]]=[[9],[5],[7]]`,then `(x,y,z) ` =
(a) `(4,3,2)`
(b) `(3,2,4)`
(c) `(2,3,4)`
(d) None of these

If [(x,3x-y),(2x+z,3y-w)]=[(3,2),(4,7)], then find x,y,z,w.

If (x^(2)+y^(2)+z^(2)-64)/(xy-yz-zx)=-2 and x+y=3z, then the value of z is (a) 2 (b) 3 (c) 4 (d) 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

The image of plane 2x-y+z=2 in the plane mirror x+2y-z=3 is (a) x+7y-4x+5=0 (b) 3x+4y-5z+9=0( c) 7x-y+2z-9=0 (d) None of these

2x + 3y-5z = 7, x + y + z = 6,3x-4y + 2z = 1, then x =

A(x, y, z)=" min. "(x+y, y+z, z+x) B(x, y, z)="max "(x-y, y-z, z-x) C(x, y, z)=" max"(A(x, y, z), B(x, y, z)) D(x, y, z)=" min "(A(x, y, z), B(x, y, z)) What is the value of A(2, 3, 4)+B(2, 3, 4) ?