Two angles of a quadrilateral measure 107° and 115°. the other two angles are in a ratio of 5: 18. what are the measures of those two angles?

Interior angle of quadrilateral is 360

Sum of the two known angles 222

The sum of the other two is 360-222=138

Ratio 5:18

A=5/23*138=30

B=18/23*138=108

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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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