Answer:

Step-by-step explanation:
 
        
             
        
        
        
Answer:
 Last option: 4
Step-by-step explanation:
 The quadratic equation simplified:  has the form:
 has the form:
 
 In this case, you can identify that "a", "b" and "c" are:
 
 To solve this quadratic equation  by completing the square, Carlos should add  to both sides of the equation. This is:
 to both sides of the equation. This is:
 
 Then:
  
 
 Therefore you can observe that the number he should add to both sides of the equation is: 4
 
 
        
             
        
        
        
Answer is x=13.
basically you put them together and make them =180
        
                    
             
        
        
        
All of the above easy one