Please help me on this it is due tomorrow.. heres an image. I just wanna know how to solve it *sob sob*.

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 ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

Hi, can anyone show me how to do this problem? 100 points for this. in advance