Answer: 501, 511
Step-by-step explanation:
You add ten so 491 plus 10 would 501. 
 
        
                    
             
        
        
        
Answer:
Answers below
Step-by-step explanation:
1)  4 (x+4)
2) 4x + 16
3) 2x+8
4) 2x+8
5) 3x+9
 
        
                    
             
        
        
        
Answer:
c
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
3.418
Step-by-step explanation:
A gram is 1/1000 of a gram so if we move the decimal point over 3 places you get 3.418.