Answer:
7.8 x 
Step-by-step explanation:
this is the real answer
Answer:
6
....................................
Answer:
invalid conclusion
Step-by-step explanation:
Answer:
5 (5x1) , -10 -(5x2), 20(10x2), -40 -(20x2), 80(40x2)
so the next number should be previous number in the sequence multiplied by 2 and a negative sign.
-`(80x2) = -160
The anwser is D and I’m sure of it