[" (3) "5m-3n=19;m-6n=-7],[" (4) "5x+2y=-3;x+5y=4]

5x+2y=4 7x+3y=5

4x-2y=3 6x-3y=5

2x+3y=5 4x-5y=6

Solve the following system of equations by matrix method : 5x+7y+2=0 4x+6y+3=0 5x+2y=3 3x+2y=5 3x+4y-5=0 x-y+3=0 3x+y=19 3x-y=23 3x+7y=4 x+2y=-1 3x+y=7 5x+3y=12

Classify the following pairs of lines as coincident, parallel, perpendicular or intersecting : (i) 6x+14y-16=0 , 12x+28y-32=0 (ii) 3x-4y=8 , 3x+4y=11 (iii) 5x-2y=7 , 2y-5x=-7 (iv) 4x+7y=19 , 7x-4y=-2 (v) x-2y=7 , 4y-2x=13

Solve the following pair of linear equations by the elimination method and the substitution method: (i) x+y=5" "a n d" "2x 3y=4 (ii) 2x+4y=10" "a n d" "2x 2y=2 (iii) 3x 5y 4=0" "a n d" "9x=2y+7 (iv) x/2+(2y)/3=-1 and x-y/3=3

The equation of the bisector of that angle between the lines x+2y-11=0,3x-6y-5=0 which contains the point (1,-3) is (3x=19 (b) 3y=7 3x=19a n d3y=7 (d) None of these

The equation of the bisector of that angle between the lines x+2y-11=0,3x-6y-5=0 which contains the point (1,-3) is (3x=19 (b) 3y=7 3x=19a n d3y=7 (d) None of these

If 5x+y=19 and x-3y=7 , then x+y=

Add (i) 5m(3-m) and 6m^2-13m-13m (ii) 4y(3y^2+5y-7) and 2(y^3-4y^2+5)