Can someone answer this question only number

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.