-9-(-6)÷6 how to do this

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.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

The total number of dental clinics total for the last 12 months was recorded