The length of AC is_

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

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 results from adding the equations in this system? x+6y=9 and -x+2y=-15