Answer:
28
Step-by-step explanation:
find perimeter (25 + 25 + 45 + 45 = 140)
divide your perimeter by 5 (140 ÷ 5 = 28) 
therefore you need 28 fence posts 
 
        
             
        
        
        
First you need to multiply each side by 2 
 X - C. X - C = d * 2 
 -------- = d ---> 
 2 
Then add X from each side 
 C = d * 2 + X
        
                    
             
        
        
        
Answer:
ion k
Step-by-step explanation: