[" 1."x+y=6;quad x-y=4],[" 2."x+y=0;2x-y=9]

Solve for x and y: 0.4x-1.5y=6.5, 0.3x+0.2y=0.9

Classify the following pairs of lines as coincident,parallel or intersecting: x+2y-3=0 and -3x-6y+9=0x+2y+1=0 and 2x-4y+3=03x-2y+5=0 and 2x+y-9=0

Prove that the radii of circles x^2 + y^2 = 1, x^2 + y^2 - 2x -6y = 6 and x^2 + y^2 - 4x - 12y = 9 are in A.p.

Radii of circles x^(2) + y^(2) = 1, x^(2) + y^(2) - 2x - 6y= 6 and x^(2) + y^(2) - 4x - 12y = 9 are in

Solve for x and y : 0.4 x - 1.5 y = 6.5 , 0.3 x + 0.2 y = 0.9 .

The area of the parallelogram formed by lines 2x-y+3=0, 3x+4y-6=0,2x-y+9=0, 3x+4y+4=0 is (in sq units)

The angle between the pair of tangents drawn from a point P to the circle x^2+y^2+4x-6y+9sin^2alpha+13cos^2alpha=0 is 2alpha . then the equation of the locus of the point P is a. x^2+y^2+4x-6y+4=0 b. x^2+y^2+4x-6y-9=0 c. x^2+y^2+4x-6y-4=0 d, x^2+y^2+4x-6y+9=0

Find x+y and x-y if x=[[5,2],[0,9]] and y=[[3,6],[0,-1]] .

Find x ,\ y satisfying the matrix equations: [x-y 2 -2 4x6]+[3-2 2 1 0-1]=[6 0 0 5 2x+y5] (ii) [x y+2z-3]+[y4 5]=[4 9 12]