I believe the correct answer is B. Hopefully my answer is useful!
Please mark as brainliest as well, thanks!
 
        
                    
             
        
        
        
Answer:
8y-15
Step-by-step explanation:
-y-3(-3y+5)
-y+9y-15
8y-15
 
        
             
        
        
        
Answer: 
Step-by-step explanation:
An negative exponent seems hard, but it really isn't!
Let's say you have 
All you do is inverse the expression, or find the reciprocal. When you do this the exponent changes to positive .  

 simplifies into 8. So, the result is
 simplifies into 8. So, the result is 

Hope this helps! Please mark as brainliest, thanks!
 
        
             
        
        
        
Answer:
3?
Step-by-step explanation:
im not 100% sure
 
        
                    
             
        
        
        
Answer:
Only 16 problems correct
Step-by-step explanation:
Well I thought that since 80% is  4/5 then I should do 20 divided by 5 which will get me 4 and since I'm doing 4/5 I should go all the way up to 80% of 20 which will get me 16.
I'm not making that much sense but 
Hope this helps :)