Answer:
Step-by-step explanation:
let me asnswer it on paper hold on
Answer: the average of 3 and 15 is 9
Step-by-step explanation:
Answer:
what does it mean? can you translate it
Answer:

Step-by-step explanation:

{-84:(-4)=21 and -1764:(-84)=21 and -37044:(-1764)=21}
geometric sequence formula: 


Answer:
d
Step-by-step explanation:
d