Find the slope of the line that passes through

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.

Empty box + box + empty box fill in the box is equal to 30 how

X+ y = 5 ; x - y =3 solve using linear combination