Answer:
Ox=4 is the answer for the question 
 
        
             
        
        
        
The answer to your question is 7.4.
        
                    
             
        
        
        

Start by dividing both sides by 3. Then take the square root of both sides. Then subtract 3 from both sides and divide by 2.  
 
        
                    
             
        
        
        
Sammy is the tallest one because he is 4.667 feet tall
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation:
Hope this helps :D