The equation is (X+9)+6=5
        
                    
             
        
        
        
A.A is your best answer
A vertex is "the apex" of the angle.
See attached photo.
hope this helps
 
        
             
        
        
        
1.) - Salmon                Trout        Halibut
       /       |           \        /   |  \         /   |  \
   Fries Carrots Slaw  F   C  S     F  C   S
-There is 9 different options, assuming that since its a combination problem and not a sequence problem, order doesn't matter.
        
                    
             
        
        
        
Answer:
(4x + 2y)mi
Step-by-step explanation:
Check attachment
 
        
             
        
        
        
Use 
bodmas
multiply 6 and 3= 18
then add the answer with 23 
18+23=455
the answer you get, subtract it from 7
455-7=448
the answer is 448