Ian says that if x < y, then | x | < | y |. Give one example where Ian's statement is true. Then provide one example that proves Ian's statement is not always true. hurry please! ill give brainliest

Solution:

Proving that Ian is not always true:

Proving that Ian is sometimes true:

This proves that:

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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b. 153 students do not participate in sports and seventy-five 12th graders were surveyed