What is the sum of the first 30 terms of this arithmetic sequence?

6, 13, 20, 27, 34, …

3225

Step-by-step explanation:

The sum to n terms of an arithmetic sequence is

= [ 2a + (n - 1)d ]

where a is the first term and d the common difference

here a = 6 and

d = 13 - 6 = 20 - 13 = 7, hence

= [ (2 × 6) + (29 × 7) ]

                          = 15(12 + 203) = 15 × 215 = 3225

not sure but it may be b, as i said i'm not sure.

idk

step-by-step explanation: