Answer
$a_{110}=-66.5$
Work Step by Step
The nth 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
$a_n=n^{th}$ term
The given arithmetic sequence has:
$a_1=-12
\\d=-0.5$
Use the formula above to find the 110th term:
$a_n=a_1+(n−1)(d)
\\a_{110}=-12+(110−1)(-0.5)
\\a_{110}=-12+109(-0.5)
\\a_{110}=-12+(-54.5)
\\a_{110}=-66.5$