Answer:
The  value  is  
Step-by-step explanation:
From the question we are told that 
    The  area of the rectangular pen is  
      The  cost of material used to make one side is  
     The  cost of material used to make the other sides is  
Now  , the fence to be build around the rectangular pen  has four sides, the first opposite sides are equal, let assume each of the to be x yard   and the other opposite sides are also equal as well let assume of the to be y yard 
So the cost is mathematically represented as 
        
=>   
=>   
Now the area of the fence is mathematically represented as 
       
=>    
=>  ![C =   9x  +  6[\frac{24}{x} ]](https://tex.z-dn.net/?f=C%20%3D%20%20%209x%20%20%2B%20%206%5B%5Cfrac%7B24%7D%7Bx%7D%20%5D)
=>   ![C =   9x  +  [\frac{144}{x} ]](https://tex.z-dn.net/?f=C%20%3D%20%20%209x%20%20%2B%20%20%5B%5Cfrac%7B144%7D%7Bx%7D%20%5D)
Now differentiating 
      
      
At minimum 
So  
      
      
     
     
Now substituting for x in the equation above to obtain minimum cost 
        ![C =   9(5.66)  +  [\frac{144}{5.66} ]](https://tex.z-dn.net/?f=C%20%3D%20%20%209%285.66%29%20%20%2B%20%20%5B%5Cfrac%7B144%7D%7B5.66%7D%20%5D)
        
     
  
 
        
             
        
        
        
Answer:
Do the parentheses first. then the operations. Then solve
Step-by-step explanation:
 
        
             
        
        
        
YESSSS IT ISSSS CORRECTTT!!!!❤️❤️
        
                    
             
        
        
        
Answer:
-22
Step-by-step explanation:
4 + 9 + (16 ÷ 4 - 8 - 3) × 5
= 13 + (4 - 8 - 3) × 5
= 13 - 7 × 5
= 13 - 35
= -22