(Picture included) I just need part c and I’m really stuck

the mean of her survey has increased in the second set of data (by 2)

Step-by-step explanation:

if no one has been given homework since the last time she surveyed, the number of days of not being given math homework will have increased by two for each student, as she surveyed again two days later and nothing changed. therefore overall, everyone's data increases by two therefore raising the mean of her second set by 2

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u dumb boi

step-by-step explanation:

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

rauschg · hand

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step-by-step explanation: