Answer:
She subtracted 7x instead of dividing it. Personally, i wouldn't have done that. I would subtract the 14 first, then divide.
 
        
             
        
        
        
Answer:
17:3 is 68:12 simplified
15 slices will be eaten in 10 minutes
Step-by-step explanation:
first off 17:3 is 68:12 simplified (both 68 and 12 go into 4 resulting in 17 and 3) 
you have to divide 10 by 2 which will give you 5 
and then multiply by 3 
to get 15
 
        
                    
             
        
        
        
The answer is -12
these are the steps on how to find that 
-2x2y
-2(-3)2(y)
6 times -2
-12
        
             
        
        
        
Answer:
D
Step-by-step explanation: