Answer:
i think the answer is B
Step-by-step explanation:
hope this helps you ;)
first blank negitave
second blank positive
i think it's 20 but i'm not that sure
c = unknown
a = 4c
120 = 2a + 2c
120 = 2(4c) + 2c
120 = 8c + 2c
120 = 10c
120/10 = 10c/10
c = 12
the next ones are 2, -2, -6,-10,-14,-18 and so on
