Answer:
a(25) = 117
Step-by-step explanation:
First look at how the given terms behave:
From -3 to 2 is a jump of 5;
From 2 to 7 is a jump of 5;
From 7 to 12 is a jump of 5
Since there is a common difference, this is an arithmetic sequence.
The general formula for an arithmetic sequence is a(n) = a(1) + 5(n - 1).
Thus, a(25) = -3 + 5(25 - 1), or a(25) = -3 + 120, or a(25) = 117
