Answer:
f ○ g(x) = x and g ○ f(x) = x  is the correct composition
Step-by-step explanation:
INVERSE FUNCTIONS: Two functions are said to be inverse of each other if for every y = f(x), there exists a function g(x), 
such that x =  =  g(y)
 =  g(y)
Now, here if we need to show tha two functions f(x) and g(x) are inverse functions of each other , then show that for every x:
1.  f  o g(x)   =   f(g(x))= x
2. g o f(x)  =  g(f(x))   = x
If any two functions satisfy these two conditions, then they are inverse of each other.
 
        
             
        
        
        
Answer:
Line B
Step-by-step explanation:
Line B would best fit the scatter plot because the dots aline most similar to how Line B does. If you were to look at the angle Line B is at, most of the dots line up in the way Line B does. Therefore, Line B best fits the scatter plot.
 
        
                    
             
        
        
        
Answer: B
Step-by-step explanation:
Oki so I know this becaue I study to much and because if there was an answer saying this : y=6x+3 it would be wrong because it is adding to the constant
So y=6x is proportinal because it is allways constant. I forgot this was an example sorry. 
 
        
                    
             
        
        
        
Answer:
d. only the first equation is an identity
Step-by-step explanation:
 
        
             
        
        
        
An arc of length 30 m : l = 30 m.
r = 15 m,  ∠ A = ?
Formula for the length of an arc is:
 l = r π A / 180°  ( where A is the central angle )
 A = l · 180 / r π = ( 30 · 180 ) / ( 15 · 3.1415926 ) = 114.43 °
This is very close to your result.