Please I need help with this ASAP. A Chef thought of a very challenging formula for a combination of codes for his locker. He can use n numbers to set the code to his locker. He wants to hide all his recipes in it. He wants to know how many codes he can make so that he can change the password to his locker every week. He came up with the following formula but he forgot how to simplify it.
2nC1 + 2nC2 + 2nC3 + ... 2nCn + ... 2nC2n
Simplify this formula for him to tell him the number of combinations he can use in terms of n.

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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answers

rauschg

rauschg · hand

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step-by-step explanation:

b. is the answer xx

x³ + x² - 6x

x(x² + x - 6)

x((x + 3)(x - 2))

x(x + 3)(x - 2)

x = 0

x + 3 = 0

x = -3

x - 2 = 0

x = 2

x = 0, -3, 2

(0,0) (-3,0) (-2,0)