Answer:
480
Step-by-step explanation:
Sn = n÷2 × (2a + (n-1)d)
n = 20 a = -14 d = 4
S20 = 10 × (-28 + 19 × 4) = 480
Oof idk if u like bts but I saw ur username said jiminahh
12 + 8 = 20 Omar has 20 points now
Answer:
I don't know your answer options, but this is what the graph would look like:
**please mark brainliest!!