0.2x+0.7y=1.3

Solve the following simultaneous equations: 0.4x+0.3y=1.7, 0.7 x -0.2 y = 0.8

0.3x + 0.7y = .13 0.4x + 0.5y = .13

{:(0.4x + 0.3y = 1.7),(0.7x - 0.2y = 0.8):}

{:(0.4x + 0.3y = 1.7),(0.7x - 0.2y = 0.8):}

0.4 x + 0.3 y = 1.7 , 0.7 x - 0.2 y = 0.8

Solve the following system of equations: 0. 4 x+0. 3 y=1. 7 ,\ \ \ 0. 7 x-0. 2 y=0. 8

The equation of the ellipse with focus (-1,1) directrix x-y+3=0 and eccentricity is a. 7x^2+2x y+7y^2+10 x+10 y+7=0 b. 7x^2+2x y+7y^2+10 x-10 y+7=0 c. 7x^2+2x y+7y^2+10 x-10 y+7=0 d. None of these

If 2x^(2)+2y^(2) +4x+5y+1=0 and 3x^(2)+3y^(2)+6x -7y+3k=0 are orthogonal ,then value of k is

The system of equations x +2y+3z=1, x-y+4z=0, 2x+y+7z=1 has

Solve by cross-multiplication method. (i) 8x-3y=12,5x=2y +7 (ii) 6x+ 7y -11 =0, 5x+ 2y =13 (iii) (2)/(x)+(3)/(y) =5, (3)/(x) -(1)/(y) +9=0