A certain company's charges for tiling a rectangular room include the cost of the material used and a flat rate for installation. The length of a certain room is 2 feet more than its width, and the company's charges, in dollars, for tiling the room are 12.5x(x+2) + 400. Match each part of this expression with what it represents in this context. Available Responses: the width, in feet, of the room the length, in feet, of the room the area, in square feet, of the room the cost, in dollars, for tile per square foot the amount of materials needed to cover the room's floor the flat rate, in dollars, the company charges for installation 12.5 represents x(x+2) represents 400 represents