What point on y-axis is equidistant from the points (7, 6) and (-3, 4) ?

Calculate the distance between A(7, 3) and B on the x-axis whose abscissa is 11.

A is a point on the y-axis whose ordinate is 5 and B = (-3, 1). Find AB.

Show that the point (2, 2) is equidistant from the points (-1, -2) and (-3, 2).