Asap plz need answer has to be done today

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

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.

X-intercept=-5 y-intercept=2 the equation of the line is