Quick and explain. i'm offering 25pts and brainliest answer

A. Subtract the difference between the two columns for two sets of numbers:

30-20 = 10

135 -110 = 25

40-30 = 10

160 - 135 = 25

So for every 10 t-shirts the total cost raises by 25

25 / 10 = 2.50 per t-shirt.

The starting cost is when 0 t shirts are sold.

110 - 50 = 60

The equation would be C = 2.50n + 60

( Multiply 2.50 by the number of t-shirts sold and then add the starting cost of 60).

B. See attached picture.

C. Using the equation from A replace n with 120:

C = 2.50(120) +60

C = 300 + 60

C = 360

It would cost $360.00

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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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