Answer:good for him
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
x = 13 
Step-by-step explanation:
First start with the blank equation 

Plug in the legs and hypotenuse. Remember c squared is always the hypotenuse. 

Then solve
25 + 144 = 
169 =

c = 13
 
        
             
        
        
        
It should be B If I am correct if I am not I am sorry
        
             
        
        
        
First round 15.25 to 15.30 and round 4.85 to 4.90 and then add you get 21.20  no it is not reasonable and you round to the decimal ones