## Geometry: Common Core (15th Edition)

Subtract 3 to get the next term. $\underset{-3}{\underset\Rightarrow{15}}, \underset{-3}{\underset\Rightarrow{12}},\underset{-3}{\underset\Rightarrow{9}}, \underset{-3}{\underset\Rightarrow{6}},\underset{-3}{\underset\Rightarrow{3}}, 0$, . . .