100 points!! plz answer im indanger of faling

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.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

How do you write y-10=2 (x-8) in standard form