tiaramorning94
tiaramorning94
28-05-2020
Mathematics
contestada
20th term of 12, 15, 18, 21
Respuesta :
Аноним
Аноним
28-05-2020
Answer:
69
Step-by-step explanation:
The rule: 3n+9
n=20
3(20)+9
60+9
69
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