math
posted by lisaa .
A rectangle has a perimeter of 120 cm.
Write the length of the rectangle as a function of its width.

2 L + 2 W = 120
so
L + W = 60
so
L = 60  W 
oh yea there's a second part of it. how do i find the range and domain.
I got
domain => x=R<60
range => y=R<60 
Neither can be negative !

hmm
x=R; 0<x<60
y=R; 0<x<60
how's that 
I like that better.