theta(x)+4y=-4;3y-5x=-1

2x-y=4 ; 5x+4y=1

The lines parallel to the normal to the curve x y=1 is/are 3x+4y+5=0 (b) 3x-4y+5=0 4x+3y+5=0 (d) 3y-4x+5=0

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

3x-4y=10 , 4x+3y=5

If x:y = 1:1, then (3x+4y)/(5x+6y) = ____.

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

Simplify. (1.5x -4y)(1.5x +4y +3) -4.5x + 12y

If ("cos"^4 theta)/(x) + ("sin"^4 theta)/(y) = 1/(x + y) ( theta is constant) then (dy)/(dx) =

Solve the following pair ofequations by substitution method.(3)/(2)x-y=(1)/(4);x+(1)/(2)y=1 and 3x+y=4,2(y-5)=-5x