54 because i got that a b and dc equal 6 and ad and bc equal 9 
        
             
        
        
        
255555666666)))$$$!!&&&&&
        
             
        
        
        
Answer:
Note: in vertex form, there is a negative sign in front of the h , so you must take whatever h value there is an make is opposite.
 
        
                    
             
        
        
        
Answer:
(0,-3)
Step-by-step explanation:
 
        
             
        
        
        
<span>18L+4v=1344
-4(L+v=84)
18L+4v=1344
-4L+-4v=-336
14L=1008
L=72
84-72=12
v=12</span>