Answer
$a_{9}=67$
Work Step by Step
The $n^{th}$ term of an arithmetic sequence can be found using the formula:
$a_n = a_1 + (n-1)d$
where
d = common difference
$a_1$ = first term
$\\a_n= n^{th} \text{ term}$
The given arithmetic sequence has:
$a_1 = -5
\\d=9$
Use the formula above to find the 9th term:
$a_n=a_1+(n-1)(d)
\\a_{9}=-5 + (9-1)9
\\a_{9}=-5+8(9)
\\a_{9}=-5+72
\\a_{9}=67$