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
X would be 0 and y would be 2 so it would be (0,2)
I don’t think it is, sorry I’m not 100% sure, good luck though
Answer:
(3,2)
Step-by-step explanation:
3,2 is the answer...hope you can understand
