Write the first three terms of the arithmetic sequence described below:

First-term $30$; the sum of the six terms is $300$.

The sum of the first five terms of an arithmetic sequence is $150$ and the sum of the first ten terms is $550$.

What is the third term of the sequence?

The sum of the first five terms of an arithmetic sequence is $150$ and the sum of the first ten terms is $550$.

What is the eighth term?

The sum of the first five terms of an arithmetic sequence is $150$ and the sum of the first ten terms is $550$.

What are the first three terms of the sequence?

Find the sum of the first $25$ terms of the arithmetic sequence below.

$11, 22, 33,\dots .$

Find the sum of the first $25$ terms of the arithmetic sequence below.

$12, 23, 34,\dots$

Find the sum of the first $25$ terms of the arithmetic sequence below.

$21, 32, 43,\dots .$

Find the sum of the first $25$ terms of the arithmetic sequence below.

$19, 28, 37,\dots$