1. michelle wants to determine the height of the flag pole outside of her school. she places a meter stick next to the flag pole and measures the shadow of the meter stick and the flag pole. if the meter stick has a shadow of 180 centimeters and the flag pole has a shadow of 39.6 meters, then how tall is the flag pole? choices are below
a. 22 meters
b. 220 meters
c. 11 meters
d. 455 meters

any options?

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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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