Homework Help: Algebra

Posted by Rob on Sunday, November 21, 2010 at 11:33pm.

A gardener has 60 feet of fencing with which to enclose a garden adjacent to a long existing wall. The gardener will use the wall for one side and the available fencing for the remaining three sides.

(a) If the sides perpendicular to the wall have length x feet, which of the following represents the area A of the garden?
A(x) = –2x2 + 30x
A(x) = –2x2 + 60x
A(x) = x2 – 60x
A(x) = 2x2 – 60x

Algebra - PsyDAG, Monday, November 22, 2010 at 7:11am
Online "^" indicates an exponent.

Area = length * width

If x = length of each of the two sides, then the width = 60 - 2x

Thus the area = x(60-2x) = 60x - 2x^2

Unless you have a typo, I would not pick any of the choices.

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