Please answer this question, o don’t understand it at all

Will mark brainliest

Definition: es. this is a disadvantage or weak point that makes someone or something less effective.

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.

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost