Answer: Yes it is a function.
Step-by-step explanation: When trying to find out, you put it into a calculator and can tell by the line if it is a function.
 
        
             
        
        
        
B ifffh my sdtvhh by has the
        
                    
             
        
        
        
Answer:
B and C
Step-by-step explanation:
(-7)•8z = -56z 
(-4)•(-7)=28
and
40•(-1.4)= -56z
40•0.7= 28
 
        
             
        
        
        
Answer:
396°
Step-by-step explanation:
Difference = 357 -(-39) = 357+38 = 396°
 
        
                    
             
        
        
        
Answer:
looks hard
Step-by-step explanation: