Answer:
147
Step-by-step explanation:
The n th term of an arithmetic sequence is
[tex]a_{n}[/tex] = a + (n - 1)d
where a is the first term and d the common difference
here a = 3 and d = 9 - 3 = 15 - 9 = 6, hence
[tex]a_{25}[/tex] = 3 + (24 × 6) = 3 + 144 = 147
