Answer:
![\boxed{\boxed{\sf~a_6=23}}](https://img.qammunity.org/2022/formulas/mathematics/high-school/1wdjhmbbgnqj9ulr05axgp29879ar3dfpx.png)
Solution Steps:
This is an arithmetic sequence since there is a common difference between each term. In this case, adding 5 to the previous term in the sequence gives the next term. In other words,
.
Arithmetic Sequence:
![d=5](https://img.qammunity.org/2022/formulas/mathematics/high-school/aekii3cq3b9aoopqgytwhsbeb0pzpz5j69.png)
Find the next term using the Arithmetic Sequence.
Arithmetic Sequence:
![a_6=a_5+5](https://img.qammunity.org/2022/formulas/mathematics/high-school/21v9oy0evcgxk9wm7tchpepu4s0fj4jfpe.png)
![a_6=18+5=23](https://img.qammunity.org/2022/formulas/mathematics/high-school/by61zadew26hlif7wzpvc9j9r5p32njlqw.png)