Answer:
175 square feet
Step-by-step explanation:
the area of the whole thing is 400 ft. (20 x 20=400) 
i got the 20 from the perimeter b/c 20+20+20+20=80
then subtract the area of the pool from 400 to get 175. 
 
        
             
        
        
        
Answer:
2 or 1
i mostly think its 2 but im not sure 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
2x+17
Step-by-step explanation:
-4y+8-3x+4y+9+5x
Combine like terms
-3x +5x    -4y +4y    +8+9
2x             +0             +17
 
        
                    
             
        
        
        
<span>461.81 cm^3 .................................</span>