a perpendicular is drawn from a point P(1,2) to the line with equation 3x+4y-12=0 and meet at Q. find the coordinates. of Q

Answer 1

The equation of the perpendicular will be (-3/4)=(y-2)/(x-1)

The co-ordinates of Q will be the intersection of the perpendicular with the original line, i.e. the solution of the set of 2 linear equations.

I will leave that solution to you!