I'm confused, please help. :/

81

Step-by-step explanation:

so angle a is supplementary with the angle that is equal to 143. supplementary means that the two angles added together will equal 180 so to get angle a we do 180-142 which equals 38.

now that we have two angles we can get the last one which is b and to do that we subtract both angles from 180 because all of the angles have to add up to 180.

180-38-61=81

angle b = 81

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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answers

rauschg

rauschg · hand

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step-by-step explanation: