A mall manager records the number of customers who enter the mall each day. The box plot represents the data.
300
400
500
600
200
Number of Customers
Which statement is true?
A The data is not symmetrical, so the mean is the best measure of center for the data.
The data is not symmetrical, so the median is the best measure of center for the data.
C The data is symmetrical, so the mean is the best measure of center for the data.
The data is symmetrical, so the median is the best measure of center for the data.
B
D

:D

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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