### Instruction: Sandy plans to paint one wall in her bedroom. The wall is 9 feet high and 12 feet long. There is a 2-foot by 4-foot area on that wall that she will not have to paint due to the window. How many square feet will she need to paint?### Response: I want to find the area of the wall that Sandy will paint, so I need to subtract the area of the window from the area of the wall.
The area of the wall is the product of its height and length, so I multiply 9 by 12 to get 108 square feet.
The area of the window is the product of its height and length, so I multiply 2 by 4 to get 8 square feet.
To find the area of the wall that Sandy will paint, I subtract 8 from 108 to get 100 square feet.
I check my answer by adding the area of the window and the area of the wall that Sandy will paint, and I get 108 square feet, which is the same as the area of the wall.