Asociology instructor gives students points for each discussion-board post and
points for each reply to a post. ana wrote 4 posts and 9 replies and received 123
points. jae wrote 3 posts and 3 replies and received 66 points. determine how
many points a discussion post is worth and how many points a reply is worth
a discussion post is worth
point(s) and a reply is worth
point(s).

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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rauschg

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answer: 800

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