Suppose you are the manager of a high school cafeteria. You want to create a new breakfast and lunch menu for the students. Describe at least two different methods that could be used to collect data about food items to offer on the menu. How can you ensure that the results are reliable? Explain.

by making a recipt with a cash machine or putting a thing for everytime someone buys something

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answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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