To find the answer you need to find the square root of e^2 to get e so what you do to one side of the equation you do to the other side of the equation so find the square root of 0.36.
e=positive or negative 0.6
        
             
        
        
        
45 handshakes are possible
        
                    
             
        
        
        
Answer:
20% mark up
Step-by-step explanation:
[(48-40)/40]×100%= 20%
 
        
             
        
        
        
Answer:
3,4
Step-by-step explanation:
 
        
                    
             
        
        
        
You need to watch a video on polynomials, that's how i learned to factor Polynomials 
 https://www.youtube.com/watch?v=5MA1eZVegg4 - click on the uploader and you'll find how to factor it. 
i can't GIVE u the answers but YOU WILL LEARN IT :)