8 and 4
8+4=12
8-4=4
hope this helps
        
             
        
        
        
There are infinite numbers
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Recall that the formula for density is: 

therefore for this case we have:

 
        
                    
             
        
        
        
Answer:
You've picked the right one! It's the one you've marked in the picture!
Step-by-step explanation:
Multiplication is just like addition; you're just doing it multiple times instead of once. 3<em>x</em> is equal to <em>x</em> + <em>x</em> + <em>x</em>. That's exactly what the option you chose in the image shows. Great job! You've got this!