Jessica purchased a DVD that was on sale for 12% off. Let y represent the original price of the DVD. Write an expression that can be used to determine the cost of the DVD on sale.

0.88y

Step-by-step explanation:

y = original price

Jessica purchased a DVD that was on sale for 12% off.

Write an expression that can be used to determine the cost of the DVD on sale

cost of the DVD on sale = original price - 12% of the original price

= y - 12% of y

= y - 0.12*y

= y - 0.12y

= 0.88y

cost of the DVD on sale = 0.88y

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

know the answer? add it here!

step-by-step explanation:

first one because it can't have a fraction in it

step-by-step explanation: