Answer:
The determinant of the matrix for the the pineapple cake is 4,350. the price of one pineapple cake is 3,520 
The determinant of the matrix for the chocolate cake is 5,075 . the price of the chocolate cake is 4,414
 
        
             
        
        
        
Answer:
13
Step-by-step explanation:
1710/125 = 13.68
You need 
125 x 13 = 1710
A student could take 13 credits.
 
        
             
        
        
        
Answer:
The value of the second expression is 12, so the expressions are not equivalent.
Step-by-step explanation:
 
        
                    
             
        
        
        
He arrives at 9:30 because if you take 8:40 (when dealing with time I like to think of it as a whole number so 8:40 would become 840) then just add 50 minutes to 8:40 (or 840+50 which equals 890 also know as 9:30 because you have to subtract 60 from 90 (because 60 is the limit in time (well technically 59 is)) then add one to 8 like so, which equals 9:30 Enjoy!=)