Which is a common denominator for the numbers: 40 and 28

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Let's list 10 multiples of 40 and 10 multiples of 28.

The first 10 multiples of 40 are:

40, 80, 120, 160, 200, 240, 280, 320, 360, 400...

The first 10 multiples of 28 are:

28, 56, 84,112, 140, 168, 196, 224, 252, 280

I have highlighted it. Guess why!

Because it's the LCM (LEAST COMMON MULTIPLE) of 40 and 48.

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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rauschg

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the answer is 2/54

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