The line thorugh the points (h,3) and (4,1) intersects the line 7x-9y - 19 = 0 at right angle. Find the value of h.

The line through the points (h,3) and (4, 1) intersects the line 7x-9y -19 = 0 at right angle. Find the value of h.

The line through (4, 3) and (- 6,0) intersects the line 5x + y = 0. Find the angles of intersection.

Find the equation of the line passing through the point of intersection of the lines 4x+7y-3=0, 2x-3y+1=0 that has equal intercepts on the axes.

If the lines joining the origin to the intersection of the line y=nx+2 and the curve x^2+y^2=1 are at right angles, then the value of n^2 is

Prove that the line through A(0,-1,-1) and B(4,5,1) intersects the line through C(3,9,4) and D(-4,4,4). Also find their point of intersection.

Find the equation of the line passing through the point of intersection of the lines x+5y+7=0 and 3x+2y-5=0 (a) parallel to the line 7x+2y-5=0

Find the equation of a straight line passing through the point of intersection of the lines : 3x +y-9 =0 and 4x + 3y-7=0 and perpendicular to the line 5x -4y + 1 =0.

Find the equation of the lines passing through the point (-4,5) and the point of intersection of the lines 4x-3y+7=0 and 2x+3y+5=0.

Find the equation of the line passing through the point of intersection of the lines 4x + 7y-3 = 0 and 2x -3y +1=0 that has equal intercepts on the axes.

Find the co-ordinates of the point, where the line: (x-2)/3=(y+1)/4=(z-2)/2 intersects the plane x-y+z-5=0 . Also find the angle between the line and the plane.