What is the circumference of the following circles? r=5 what is the units? Units

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.

5/6+7/8what is the answer sealsdbdbshd

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55