Posted by **lisaa** on Monday, January 19, 2009 at 8:45pm.

A rectangle has a perimeter of 120 cm.

Write the length of the rectangle as a function of its width.

- math -
**Damon**, Monday, January 19, 2009 at 8:47pm
2 L + 2 W = 120

so

L + W = 60

so

L = 60 - W

- math -
**lisaa**, Monday, January 19, 2009 at 9:06pm
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

- math -
**Damon**, Monday, January 19, 2009 at 9:28pm
Neither can be negative !

- math -
**lisaa**, Monday, January 19, 2009 at 9:32pm
hmm

x=R; 0<x<60

y=R; 0<x<60

how's that

- math -
**Damon**, Monday, January 19, 2009 at 9:45pm
I like that better.

## Answer this Question

## Related Questions

- basic geometric - 10. a rectangle has width the same as a side of a square whose...
- maths - the length of a rectangle is 3 less than 5 times its width. Write a ...
- Math - The variable W represents the width of a rectangle. The length of the ...
- basic geometry - A rectangle has width the same asa a side of a square whose ...
- math - the length of a rectangle is 5 ft more than twice the width. a)if x ...
- geometry - If the length of a rectangle is twice its width, w, write an ...
- math - the function for the perimeter of a rectangle is given as P=4x+6 a) Give...
- math b - the function for the perimeter of a rectangle is given as P=4x+6 a) ...
- math - Suppose that the width of a rectangle is 5 inches shorter than the length...
- Math - The perimeter of rectangle Z is equal to its area.Rectangle Y has the ...