Are the lines `y=x` and `y+x=0` perpendicular?

Find the equation of straight line passing through the point of intersection of the straight lines 2x - 3y + 4 = 0 and x + 2y - 5 = 0 and perpendicular to the line 3x - 4y + 5 = 0.

Find the equation of the straight line passing through the point (ii) (1, -5) and perpendicular to the line 2x + 5y + 4 = 0

For what value of k,the lines 3x+2y-4=0 and kx-4y+5=0 are parallel?

Find the equation of the straight line passing through the point (ii) (2, -3) and perpendicular to 4x - 5y + 9 = 0

Find the value of k for which the lines 5x + 4y - 6 = 0 and 2x + ky + 9 = 0 are (ii) perpendicular.

The roots of the equation x+2y=4 and 2y-x=0 are

Find the points on the curve y^2 = x^2 (a - x) where the tangent is perpendicular to the X-axis

Find the equation of the tangents to the circle x ^2 + y ^2 - 2x - 4y - 4 = 0 which are perpendicular to the line 3x - 4y - 1 = 0

Find the angle between the lines x-sqrt 3y=1 and sqrt 3x-y=1 .