Show that the line `27x-18y+25=0 and 2x+3y+7=0` are perpendicular to each other.

Show that lines x-2y-7=0 and 2x+y+1=0 are perpendicular to each other. Find their point of intersection.

The value of k such that the lines 3x-7y+13=0 and kx+2y-5=0 are perpendicular to each other is

Show that the straight line x-2y+3=0 and 6x+3y+8=0 are perpendicular .

Show that the lines x=-y =2z " and " x+2 =2y -1 =-z +1 are perpendicular to each other .

Find the value of p if the lines, whose equations are 2x - y + 5 = 0 and px + 3y = 4 are perpendicular to each other.

The lines 3x+4y+7=0 and 4x+3y+5=0 are perpendicular.

Find the value of lambda for which the planes 2x-4y+3z=7 and x+2y+lambdaz=18 are perpendicular to each other.

Show that the line (x-5)/7=(y=2)/(-5)=z/1 and x/1 =y/2=z/3 are perpendicular to each other.

Show that the lines (x-5)/7=(y+2)/(-5)=z/1 and x/1=y/2=z/3 are perpendicular to each other.