A book is marked 20% off. What percent of the original price is the sales price? (What percent do you still have to pay for?) If the original price is $55, how much will the sales price be? If the sales price rings up as $46.60, what was the original price?

1. 80%

2. $44

3. 58.25

Step-by-step explanation:

If a book is 20% off then it will still have 80% that you have to pay for because the highest possible percentage is 100% and 100-20 is 80.

Percents can also be represented as decimals.

20% -> .20 80%->.80

There are two ways you can solve the next question.

55 - 55(.20) = 44

55(.80) = 44

If $46.60 is the sales price then it is .80 of the original price.

This can be written as an algebraic formula.

Let x be the unknown total price.

.80*x = 46.60

x = 46.60 ÷ (.80) = 58.25

You could also realize that .80=80/100=4/5. So divide 46.60 by 4 and multiply that by 5.

46.60÷4=11.65

11.65*5=58.25

i would pic false cause it goes down towards negative

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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rauschg

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step-by-step explanation: