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Old 07-16-2010   #1
twisted
 
Join Date: Jul 2010
Posts: 1
Default Help! Fiding dimentions from an equation.

I need some help figuring out how to find the dimensions to this question:

A rectangle has perimeter 64cm and area 23cm^2. Solve the following system of equations to find the rectangle's dimensions.

a) l = 23/w
l + w = 32

b) solve the system of equations
x^2 + y^2 = 1
xy = 0.5

Please and thank you! I know the answer, I just don't know how to do the question.
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