Homework Help: 12th grade

Posted by Mady on Tuesday, January 19, 2010 at 4:25pm.

The legnth of a rectangular floor is 2 feet more than it's width. The area of the floor is 168 square feet. Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visible on all sides. What should the legnth of the rug be?

12th grade-Math - DrBob222, Tuesday, January 19, 2010 at 4:34pm
Your first job should be to determine the dimensions of the floor.
Let X = width, then
X + 2 = length.
The area is 168; therefore,
X(X+2) = 168 which expands to
X^2 + 2X - 168.
Solve that for X and X+2 then look to see how much smaller the rug should be. Post your work if you get stuck.
12th grade - Natalie, Sunday, July 4, 2010 at 12:08am
the rug should 2

Answer this Question

Related Questions

12th grade - The length of a rectangular floor is 2 feet more than its width. ...
12th grade - The length of a rectangular floor is 2 feet more than its width. ...
algebra - The rectangular floor of a shed has a length 4 feet longer than its ...
johnson - The length of a rectangular floor is 2 feet more than its width. The ...
math - The area of a rectangular floor is 72 ft2. The length of the floor is 1 ...
Algebra - The floor of a one-story building is 14 feet longer than it is wide (...
calculus - A multistoried building has a floor area of 2,000 square feet on the ...
fintemath - dimension of a floor; the perimeter of a rectangular floor is 90ft. ...
math - a rectangular garage has a floor area of 240 square feet. What are all ...
math - A rectangular room is 20 feet long and 10 feet wide. If you paint a red ...

For Further Reading

First Name:
School Subject:
Answer: