The MARS Candy Company claims that every 1.69 oz. bag of Plain M & M's has 54 M & M's in it. To test this claim, you buy 50 packs of 1.69 oz. plain M & M's and found that the average number of M & M's of the sample was 49. State the null hypothesis.

The mean 1.69 oz. bag of plain M&M's has 54 M&M's or greater

The mean 1.69 oz. bag of plain M&M's has less than 54 M&M's

The mean 1.69 oz. bag of plain M&M's has 50 M&M's or greater

The mean 1.69 oz. bag of plain M&M's has 49 M&M's or greater

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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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