Recent content by violetskies

Ignore all of that. So I did this: P = 2y + x 180 = 2y + x x = 180 - 2y A = xy A = (180-2y)y = 180y -2y^2 dA/dy= 180 -4y 4y = 180 y= 45 x= 180 -2(45) = 180 - 90 = 90 45 x 90 = 4050 4050 / 6 = 675 Apparently the answer is 112.5m, but I don't understand why I have...

Thank you for helping! Well, they don't actually give the length. The only number given is 180m. In class, we were taught to form an expression for the perimeter, then state one variable in terms of the other, substitute to just have one variable, then differentiate and set to 0 to find the...

Homework Statement A farmer is planning to build six adjoining rectangular pens of equal size to house his hens, as shown in the diagram. He only has 180m of fencing, however, and he wants to make the pens as large as possible. Find the maximum area he could make each pen. The diagram is...