The dot plot shows the ages of the members in a club. A dot plot whose number line is labeled Ages of members. There is 1 dot above 19, 1 dot above 45, 2 dots above 46, 2 dots above 47, 3 dots above 48, 1 dot above 49, 1 dot above 50, 1 dot above 51, and 1 dot above 53. Select from the drop-down menus to correctly complete the statement. If the youngest member leaves the club, the mean age of the club members would decrease , but the median age would stay the same .

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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