Answer:
2, -3
Step-by-step explanation:
I think this is right. 
Maybe just wait till someone else answers just to makae sure this is exactly the right answer.
 
        
             
        
        
        
Get the distance between two acres.
2.5 - 2.4 = 0.1
Divide the diffence by 2
0.1 / 2 = 0.05 - Halfway between them.
Therefore, 0.05 must be taken from 2.5 acres. it must be added to 2.4 acres to get the exact area of the park.
2.5 - 0.05 = 2.45
2.4 + 0.04 = 2.45 acres
OR 
Simply get the average of the two to get the area since it is exactly halfway between the two acres of land.
2.5 + 2.4 = 2.9 / 2 = 2.45 acres
        
                    
             
        
        
        
Answer:
c because if you subtract
 
        
             
        
        
        
5:16 is no
24:15 is no
3:12 is yes
        
             
        
        
        
45 of a number refers to 180, and 54 refers to 216. So 100 of a number is 400 and 1 of a number is 4. If 54x - 45x = 36, just plug in 4 and double check: 54(4) - 45(4) = 36 or 216 - 180 = 36, which is true.