The difference is -10 because
9-10= 1
-1-10= -11
-11-10= -21
common difference means you add and common ratios means you multiply.
hope this helps!
Answer:
answer is a. 15(3+1)
Step-by-step explanation:
um this makes sense lmk if I'm wrong
Answer:
14 is C I believe............
Answer:
C 100%
Step-by-step explanation: