10 points need ! i will mark brains 2.5.ap-5 at the beginning of summer, a maintenance crew refills a swimming pool at a city park. the relationship between the time in hours to fill the pool and the amount of water in the pool is proportional. after 4 hours, the pool holds 5,200 gallons of water. answer parts a and b. a. how could you graph this relationship? a. plot the points (4,0) and (0,5200). draw a line through these points. b. plot the points (0,4) and (0,5200). draw a line through these points. c. plot the points (0,0) and (4,5200). draw a line through these points. d. plot the points (0,4) and (5200,0). draw a line through these points

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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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