Answer:
3x-6
Step-by-step explanation:
(f+g)(x) would be the same as saying 2x+1+x-7, so then you would just simplify by combining like terms.
Answer:

Step-by-step explanation:
when adding logs, apply the log rule: 
∴ 
when subtracting logs, apply the log rule: 

Answer:
22
Step-by-step explanation:
One method of separation of homegeneous mixtures is called distillation and its based on the various boiling points of the component of mixture.
In other words the answer is letter D