9th grade math I don’t understand

Answer:
28+10n
Step-by-step explanation:
The nth term in an arithmatic sequence is shown as follows
a + 10(n - 1)
where a is the first term, n is the term we want, and d is the common difference
So to find the nth term we have
38+10(n-1)
we can simplify this furhter
38+10n-10
28+10n