Wilson cuts rectangular mats for picture frames. The area of the mat before it is cut is represented by the function M(x) = 4.5x2 + 17x + 16. The area that is cut out and removed from the middle of the mat is represented by the function
M(x) = x2 + 6x.
If x is the width of the portion of the mat that is cut out, which function best describes A(x), the area of the cut mat?
OA A(X) = 5.5x2 + 23x + 16
OB. A(x) = 3.5x2 + 11x + 16
O C.
A(x) = 4.4x2 + 17x + 10
OD. A(x) = 4.5x2 + 16x + 10

first one is a: renaming a fraction. second one is c: de-c

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my explanation is that these were the answers on edg : )

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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