Answer:
-40, 80, -160
Step-by-step explanation:
5(-2)^n-1
where n is the position
21, 34, and 55 because it's like that one ratio, I forgot the name tho
42°
AD bisects ∠CAB, which means it splits ∠CAB into two equal parts. ∠CAB equals 84°. 84° ÷ 2 = 42°.