The answer is A  to change an exponent from negative to positive, just move it into either the numerator or denominator depending on where it is to begin with. 
        
                    
             
        
        
        
Answer:
10x + 9
Step-by-step explanation:
-1 - (-10x - 10)
Distribute.
-1 + 10x + 10
10x + 9
 
        
             
        
        
        
Answer:
you have 30 left 
Step-by-step explanation: use a calculator bruh
 
        
                    
             
        
        
        
Prime only has two factors one and its self a composite number has more factor than one and its self
exsample:     12 -  1,2,3,4,6,12  = 12 is a composite number
                       7  -  1,7                 =prime number