Which expressions can be used to find the coordinates of the midpoint of pq with endpoints p(3, –1) and q(–7, –6)? check all that apply. can be used to find the x-coordinate of the point. can be used to find the y-coordinate of the point. (–7 – 3) + 3 can be used to find the x-coordinate of the point. (–6 – 1) – 1 can be used to find the y-coordinate of the point. – 1 can be used to find the y-coordinate of the point.