Part A: The area of the new dining room is 64 feet greater than the old dining room.
You need to know the formula of finding the area, which is length times width. First, you find the area of the old dining room (320 ft) and the new dining room (384 ft). Then, you subtract the areas (384-320) to get 64 feet.
Part B: The length and width of the new rug could be 12x10. The length of the original dining room was increased by 4 to create the new dining room. So, in this problem, you just add the length of the original rug (8 feet) by 4 to get 12.
