D because divide both sides by nine

Solution:
Given data:
and 
To find F(x) + G(x):
Adding two functions which gives another function.
Substitute F(x) and G(x), we get





Hence, 
Answer:
what is 40 plus 60
Step-by-step explanation:
x= 4.5
18x - 9 = 72 are the equations
Stay safe!! God bless!
<3
- Elisha
Answer:
not a function
Step-by-step explanation: