Answer:
25
Step-by-step explanation:
 
        
                    
             
        
        
        
Step 1. Multiply first equation with -3 and the second one with 2. You'll get:

Step 2. Add both equations together. You'll get:

, which gives x = -2
Step 3. Replace x = -2 in the first equation and calculate y.

The solution is: x=-2, y=5
 
        
        
        
I think the answer would be 
X=1.5
Y= -10 or -12 or 12
Sorry I'm not sure
        
                    
             
        
        
        
Answer:
B. 5 × 5 × 8
Step-by-step explanation:
Each of the boards have an area of 25. You have 8 of them.