As a = 0 , there is no sign . Its only 0. Thus the answer is (c)
 
        
             
        
        
        
Answer:
525 degrees
Step-by-step explanation:
 
        
                    
             
        
        
        
None of these answer choices are correct. The answer would be 51. 52+53=105 
105-54=51
 
        
                    
             
        
        
        
Answer:
5.2
Step-by-step explanation:
4.3/5.6 = 4/AB
AB = 5.2
 
        
                    
             
        
        
        
Answer:
Its c
Step-by-step explanation:
P.s solved it roughly