If the lines x+2y + 5 = 0 and 4x + ky+1=0are perpendicular, find k.

If the straight lines 2x + 3y - 3 = 0 and x + ky + 7 = 0 are perpendicular then the value of k is

Find the value of k for which the lines kx - 5y + 4 = 0 and 5x – 2y + 5 = 0 are perpendicular to each other

The value of k if the straight lines 3x + 6y + 7 = 0 and 2x + ky = 5 are perpendicular is ……………………

If the straight lines kx – 5y + 4 = 0 and 4x – 2y + 5 = 0 are perpendicular to each other. Find the value of k.

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

If the straight lines 2x+ 3y -3=0 and x+ky +7 =0 are perpendicular, then the value of k is

If the straight lines 2x+ 3y -3=0 and x+ky +7 =0 are perpendicular, then the value of k is

If the lines x+(a-1)y+1=0 and 2x+a^2y-1=0 are perpendicular, then find the value of adot

If the lines x+(a-1)y+1=0 and 2x+a^2y-1=0 are perpendicular, then find the value of adot