The length of a living room is 12 feet and its width is 10 1/2 feet. The length of the room is being...

5. The length of a living room is 12 feet and its width is 10 1/2 feet. The length of the room is being expanded by x feet. Select all the expressions that represent the area of the living room in square feet.
☐ 10.5(12x) square feet
☐ (10.5 + 12 + x) square feet
☐ 10.5(12 + x) square feet
☐ 126x square feet
☐ (126 + 10.5x) square feet
☐ (22.5 + x) square feet