What i is a better deal, 10 apples for 99 cents or 9 apples for 1.71

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.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Which value would be a solution for x in the inequality 47-4x< 7