Friday

February 27, 2015

February 27, 2015

Posted by **Kelly** on Saturday, January 21, 2012 at 2:55am.

- Math, Quadratics -
**Damon**, Saturday, January 21, 2012 at 5:41amL + 2w = 40

so

L = 40 - 2w

A = L * w

A =(40-2 w)(w) = 40 w - 2 w^2

2 w^2 - 40 w = -A

w^2 - 20 w = -A/2

w^2 - 20 W + 100 = -A/2 + 100

(w-10)^2 = -(1/2)(A-200)

vertex at w = 10, A = 200

so L = 20

**Answer this Question**

**Related Questions**

calculus optimization problem - A farmer has 460 feet of fencing with which to ...

calculus - a farmer wants to make a rectangular pen from 200 feet of fencing. he...

Geometry - A farmer wants to fence in a rectangular pen using the wall of a barn...

math - the challenge involves in dealing with the owner is to use a 20 meter ...

math - A FARMER BUILT A PEN FOR HIS FAVORITE PIG. THE PEN SHOWN BELOW HAS AN ...

algebra - please help me for this problem.im not good in math.the challenge ...

math - a farmer has enough fencing to build 40 feet of fence. He wishes to build...

algebra - Ian wants to build a rectangular pen for his animals. One side of the ...

math - A farmer has 60m of fencing to make a rectangular pen for his goats. ...

Calculus 2 - A farmer wishes to build a fence for 6 adjacent rectangular pens. ...