Rosa’s work finding the median of a set of test scores is shown below.
which statement best describes rosa’s first error?
she should have reordered the elements from least to greatest.
she should have added the elements and divided by 9.
she should have counted repeated elements only once.
she should have found the difference between the first and last elements.

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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answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.

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