Answer:
[tex]\large\boxed{b<-10\to b\in(-\infty,\ -10)}[/tex]
Step-by-step explanation:
[tex]-b-2>8\qquad\text{add 2 to both sides}\\\\-b-2+2>8+2\\\\-b>10\qquad\text{change the signs}\\\\b<-10[/tex]
