Determine the equation of the parabola whose graph is given below

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.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Which number line correctly shows 0.8 + 0.3?