Please help me on this it is the previous question

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 statements regarding efg are true? check all that apply.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2