Respuesta :
Step-by-step explanation:
3 + 9 = 12,
12 + 9 = 21,
21 + 9 = 30,
30 + 9 = 36.
The common difference is 9. (D)
Answer:
(d)-9
Step-by-step explanation:
12 – 3 = 9, 30 – 21 = 9, etc.
Step-by-step explanation:
3 + 9 = 12,
12 + 9 = 21,
21 + 9 = 30,
30 + 9 = 36.
The common difference is 9. (D)
Answer:
(d)-9
Step-by-step explanation:
12 – 3 = 9, 30 – 21 = 9, etc.