From Monday through Friday, Mary works in the bookstore in 1 day and in the athletic center on another day. On Saturday and Sunday, Mary writes news stories 50% of the days. How many days does Mary work in a week? What percent of Monday through Friday does Mary work?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Which math sentence can be used to determine if the triangle is a right triangle?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?