Thursday

April 24, 2014

April 24, 2014

Posted by **Anonymous** on Thursday, April 7, 2011 at 12:11am.

- geometry -
**Jai**, Thursday, April 7, 2011 at 10:18amfirst represent unknowns using variables:

let x = length of rectangle

let x-6 = width of rectangle (according to first statement of problem)

now we set up equation,, since in the problem we are given the perimeter, we can use this to set up the equation,,

recall that perimeter of rectangle is

P = 2*(L+W)

where L is the length and W is the width

substituting,

72 = 2[ x + (x - 6) ]

we can divide both sides by 2 (to cancel 2 on the right side):

72/2 = x + x - 6

36 = 2x - 6

42 = 2x

x = 21 inches (length)

x-6 = 15 inches (width)

hope this helps~ :)

- geometry -
**rolo**, Saturday, April 20, 2013 at 11:20amcool

**Related Questions**

basic geometry - A rectangle has width the same asa a side of a square whose ...

basic geometric - 10. a rectangle has width the same as a side of a square whose...

math - The width of a rectangle is x inches long. The length of that rectangle ...

Basic Algebra - The width of a rectangle is x inches long. The length of that ...

geometry - If the length of a rectangle is twice its width, w, write an ...

Math - The perimeter of a rectangle is 160 inches the length exceeds the width ...

math - Suppose that the width of a rectangle is 5 inches shorter than the length...

algebra - The length of a rectangle is 5 inches longer than its width. Its ...

Algebra Homework, HELP! - 1) A rectangle has an area of 297 square inches and a...

math - the perimeter of rectangle y is equal to its area. rectangle z has the ...