Oscar and Kim have $22.00 each to spend at a book fair, where all students receive a 30% discount. They both want to purchase a copy of the same book, which normally sells for $28.50 plus 10% sales tax. To check if he has enough to purchase the book, Oscar takes 30% of $28.50 and subtracts that amount from the normal price. He takes 10% of the discounted selling price and adds it back to find the purchase amount. Kim takes 70% of the normal purchase price and then computes 110% of the reduced price. Is Oscar correct? Is Kim correct? Do they have enough money to purchase the book? Explain your answer using complete sentences.

i don`t know its pretty hard

Step-by-step explanation:

Step-by-step explanation:

Both of them are correct. Oscar took 30% out of 28.50 which equaled 8.55. He then subtracted the discount from the original price which equaled 19.95. After that he found 10% of 20.00 (an estimate) which was 2. Finally he subtracted 2 from 19.95 making an estimate amount of $21.95. Kim, instead of finding the price of the discount, found the amount she would have to pay after the discount. She figured out that 70% of the original price would be the price after the discount. So she then took 70% of 28.50, which equaled 19.95. She then took 110% of 19.25, which equaled 21.95, and found the answer. Even though Oscar and Kim did the math in different ways they still got the same correct answer.

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step-by-step explanation:

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