Final answer:
The formula for the arithmetic sequence is nth term = 27 + (n-1) x 6.
Step-by-step explanation:
An arithmetic sequence is a sequence of numbers where the difference between consecutive terms is constant. To find a formula for an arithmetic sequence, we need to determine the common difference (d) first.
In this sequence, the common difference is 6. Since the first term is 27, we can use the formula nth term = a + (n-1)d, where a is the first term and d is the common difference. Substituting the values, we get the formula:
nth term = 27 + (n-1) x 6