If f(x) = -2x + 7, find f(8)

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.

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

If 3x+8=3x+8 is it one solution or no solution