Answer:
answer is $330
Step-by-step explanation:
If you are ever dealing with percentages always put them into a decimal itll make things a lot easier
how you do that is 55/100 which is 0.55 
then just multiply by the original number  
0.55 times 600 which is 330 
hope this helped
 
        
             
        
        
        
open the parenthes. and then after that you'll get 27+12x-15. if you simplify that then you'll get 12x+12