At a NBA game, the ratio of the score of team A to the score of team B was 16:21. If team A got 80 points how many points did team B get

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.