Answer:
a30 = 96
Explanation:
-20,-16,-12,-8,-4
We are adding 4 each time, which is the common difference
-20+4 = -16
-16+4 =-12
The formula for an arithmetic sequence is
an = a1 +d(n-1) where a1 is the first term and 4 is the common difference
an = -20 +4(n-1)
We want the 30th term
a30 = -20+4(30-1)
a30 = -20 +4(29)
= -20 +116
= 96