Ava wants to paint two walls in her room blue. both walls are 9 feet tall and 12 feet long. one wall has a 3 foot by 2 foot window and the other wall has a 3 foot by 7 foot door. what is the combined area of the two walls ava wants to paint? 189 ft2 210 ft2 216 ft2 243 ft2

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Step-by-step explanation:

it is 189ft² just trust me

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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step-by-step explanation:

x-3y=4

step-by-step e