Answer:
-8
Step-by-step explanation:
Since x = -18, we use the top formula
f(-18) = (x-6)/3
= (-18-6)/3
= -24/3
= -8
Answer: 7/3
21/9
7/3 is the fraction in simplest form
d=7
I did this question wrong so I had to edit it.... sorry :s.
