Jill had $90. she bought a skirt that normally costs $42 but was on sale for half price. she also bought a t-shirt that was $8 off its regular price. before sales tax, the total cost of the clothes was $31. what was the regular price of the t-shirt? what question is being asked in this word problem? a. what was the regular price of the skirt? b, how much money did jill have left? c. what was the regular price of the t-shirt? d. how much did jill pay in sales tax?

"how much did jill pay in sales tax? " aka d would be your answer!

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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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rauschg

rauschg · hand

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definitely a. the others have almost all data points on one side of the line.

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