Rearrange this equation to isolate c

a=b(1/c - 1/d)

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

For what type of equity loan are you lent a lump sum, which is to be paid within a certain period of time? a. a line of credit b. equity c. a second mortgage d. an amortization

Extra points! find the missing dimension! need asap