Asingle ball is taken at random from an urn containing 13 balls numbered 1 through 13. what is the probability of obtaining the following? a ball different from 1

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.

In the diagram of circle o, what is the measure of zabc?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.