Answer:
 Well, it is complicated because I've never studied that in math. I searched up the definitions of both in math and they're very similar. Permutation is a one of many possible variations and can change. A combination is the process of joining to things to be one. So if I had to choose I think I'd go with permutation since it isn't asking you to list all the ways you can make groups out of the number 30. 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x=8
Step-by-step explanation:
6x+42=90
6x=48
x=8
 
        
             
        
        
        
Answer:
409
Step-by-step explanation:
 
        
             
        
        
        
X is 63 degrees!
It is equal to the angle marked 63 degrees (angles in that arrangement are always equal)
        
                    
             
        
        
        
Micheal answered 3 wrong. 
Nythia answered 4 wrong. 
Raul answered 1 wrong. 
Tonya answered 7 wrong. 
The other student lost 36 points.