Hillary makes two transactions while at the mall: • She returns an item to get $15 back at one store.
• She buys an item for $15 at another store.

Which is a correct description of the two quantities that represent these transactions?

A
The quantities have the same magnitude, but different signs.

B
The quantities have the same sign, but different magnitudes.

C
The quantities have different magnitudes and different signs.

D
The quantities have both the same magnitude and the same sign.

there is no question content here, but you for the free points! : d

29.5977692753

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the shape,the size and the distance

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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