Final answer:
The 18th term of the given sequence is 53.
Step-by-step explanation:
The 18th term of a sequence can be found using the formula:
an = a1 + (n-1)d
In this case, the first term (a1) is -2 and the common difference (d) is -3. Plugging these values into the formula, we get:
a18 = -2 + (18-1)(-3)
Simplifying the expression, we find that the 18th term is 53.