If you knew that f(-4)=8, then what (x, y) coordinate point must lie on the graph of y=f(x)?

Plz which expression is equivalent to the expression below?

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.

Which equation represents h for right triangle abc