Answer:
x+y=-2
7x-4y=8
Step-by-step explanation:
 
        
             
        
        
        
Answer:
3/8
Step-by-step explanation:
Rearrange, find common denominator.

 
        
                    
             
        
        
        
Answer:
469 iPads were donated.
Step-by-step explanation:
The school purchased 396 iPads in total: 300+96
Now, you subtract how many the school purchased from the total amount of iPads to see how many iPads were donated: 865-396 = 469