Answer:   4.5 hours
<u>Step-by-step explanation:</u>


 
        
             
        
        
        
Answer:
(3x-5)x(3x+5)
Step-by-step explanation:
Calcula el producto
 
        
                    
             
        
        
        
Answer:
1. x - 1
2. 
Step-by-step explanation:


 
        
             
        
        
        
All you need to do for this is remove the parenthese and your answer will be  because that's the furthest it can be simplified.
 because that's the furthest it can be simplified.