Karen and Kevin collect coins. Karen has X coins. Kevin has 2 coins fewer than three times the number of coins Karen has. Write and simplify an expression for the total number of coins

3x-2

Step-by-step explanation:

Kevin has 3x-2 coins because 3 times the amount that Karen has is 3x and he has 2 coins fewer so that's -2.

51-50

step-by-step explanation:

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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