I need the answer as quickly as possible, please.

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.

Consider the function f(x)=-5x+3 what is f(-2)

Which graph has a rate of change of zero