A farmer wants to build a rectangular pen and then divide it with two interior fences. The total area inside of the pen will be 264 square meters. The exterior fencing costs $15.60 per meter and the interior fencing costs $13.00 per meter. Find the dimensions of the pen that will minimize the cost.

x = 12 m and y = 22 m

Step-by-step explanation:

Total area = 264

∴ xy = 264

      ............(1)

Cost function =

Therefore, using (1),

So, cost C(x) minimum where C'(x) = 0

m

Therefore,

                      = 22 m

So the dimensions are  x = 12 m and y = 22 m.

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation: