you bought some tile that cost $4.00 per square foot and some carpet that cost $2.00 per square foot. A total of 2500 ft.² was purchased for $6800. Your friend thought that you purchased 1600 ft.² of tile, and 900 ft.² of carpet. Decide if your friend is correct. If your friend is correct explain why. If your friend is not correct, explain the error for a reason