Answer: the first answer choice
Step-by-step explanation:
What graph i dont see a graph in this question
For sake of convenience, reverse the series, then it would be:
21,19,17.....7
a=21, d = -2,
s(4) = 4/2 (21+15)
s(4)=2(36)
s(4) = 72
Answer:
what lable i dont see nothing
Step-by-step explanation:
