Answer:
1. equation
2. equation
3. expression
4. expression
explanation is that an equation has an equal sign and an expression doesnt .  
5. equation
Step-by-step explanation:
 
        
             
        
        
        
Everything that is not 4/9
        
                    
             
        
        
        
19.83 x 1.07 = <span>21.218
$21.22</span>
        
                    
             
        
        
        
Answer:
x+y=1+3
Step-by-step explanation: