If function and inverse be 

Both will seem to be opposite and similar .
Look at the first one 
It is showing like 1 is function and other one is its inverse(Attachment )
Hence 1st one is the answer
 
        
                    
             
        
        
        
Answer:bottom line: 13 line on right: 6 1/2 Diagonal line: 13
 
        
             
        
        
        
2nd one because it’s not a lot of big number I hope it helps
        
             
        
        
        
Answer:
-9xy+16x
Step-by-step explanation:
x(y-2) +3x(6-y) -7xy
Distribute
xy -2x +18x-3xy -7xy
Combine like terms
-9xy+16x
 
        
                    
             
        
        
        
cos(30)=x/8
Rewrite the equation as 
x/8=cos(30)
Multiply both sides of the equation by 
8
.
8
⋅
x/8=8⋅cos(30)
Simplify both sides of the equation.
Tap for more steps...
x=4√3
The result can be shown in multiple forms.
Exact Form:
x=4√3
Decimal Form:
x=6.9282032