What is the total surface area of this cube?

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?