I need help getting the answers on those math questions. What are the answers?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

Solve for x and select the correct answer