Thursday

December 18, 2014

December 18, 2014

Posted by **saman** on Friday, February 7, 2014 at 3:30pm.

- math -
**Damon**, Friday, February 7, 2014 at 3:50pmL + 2 W = 120 so L = 120 - 2 W

A = L W

A = (120-2W)W = 120 W - 2 W^2

so

2 W^2 -120 W = - A

W^2 - 60 W = -A/2

W^2 - 60 W + 900 = -A/2 + 900

(W-30)^2 = -(1/2)(A-1800)

vertax of parabola at (30,1800)

so

W = 30

L = 120 - 60 = 60

and A = 1800 m^2

**Answer this Question**

**Related Questions**

Math Calculus - Three sides of a fence and an existing wall form a rectangular ...

Algebra - A builder has 80 feet of fencing to create an enclosure adjacent to a ...

word problem? - A rectangular lot is to be bounded by a fence on three sides adn...

geometry - a field bounded on one side by a river is to be fenced on three sides...

PreCalculus - Three sides of a fence and an existing wall form a rectangular ...

math - Kira has feet of fencing. She will use it to form three sides of a ...

Calculus - A farmer has 120 meters of wire fencing to make enclosures for his ...

pre-calc - a farmer wants to make a rectangular enclosure using a wall as one ...

Algebra and Trig - Aldo has feet of fencing. He will use it to form three sides ...

Calculus - A construction company wants to build a rectangular enclosure with an...