Lin had a rectangular carpet. It was too large for her living room, and so on each side of the carpet she cut a strip 1 foot wide. As a result, the are of he carpet became 26 ft smaller. What was the original perimeter of the carpet/

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?