# math

posted by .

Mickey bought 3 books from the bargain bin at his school's book fair and paid six dollars. If buying books from the bargain bin follows a direct variation, how much did his sister pay for the 4 books she bought?

• math -

\$6 / 2 b00ks = \$2. / book.
C = kx = 2x = Direct variation.

C = 2x = 2 * 4 = \$8 = Cost of Mickey's sister's books.

## Similar Questions

1. ### algebra

two sisters together have 20 books. if the younger sister lost 3 books and the older sister doubled the number she has, they would have a total of 30 books. How many books does each have?
2. ### math

for every 20 math books a school buys, they they get 7 aditional books for free. The school needs 297 math books. What is the total number of math books the school must buy in order to receive 297 math books in all?
3. ### math

MEghan had 36 books in her locker. Some were library books, text books and the rest were telephone books. THe number of library books and phone books combined equals twice the number of text books. The number of text books and telephone …
4. ### Math

A book store sells books for \$4 each. When a customer purchases 2 books they receive 1 additional book for half-price . Anna bought just enough books to receive 3 half-price books. How much money did Anna spend?
5. ### math

1. Mickey has the number of books that Minnie does. If they had 1 less book between them, they would have 27 books. The question, of course, is how many books each has.
6. ### MATHS

Mrs.Koh purchased new books for the school library, of which 6 were Mathematics books, 7 were Science books, 10 were Music books, 3 were Art books, and 4 were social studies books. All of these books were different. She picked a book …
7. ### math

Mickey has 1/3 the number of books that Minnie does. If they had 1 less book between them, they would have 27 books. The question, of course, is how many books each has.
8. ### math

Ralph bought 4 books for k dollars each. Iris bought 5 books for k dollars each. If together they spend 90 dollars, how much is each book?
9. ### math

The no of library books in a school increased by 20% after it bought new books in May , the number increased by another 20% after a book store donated 300 books in June - Find the no of books in library before it bought new books in …
10. ### English

1. I put my many books on the desk. 2. I put many books of mine on the desk. 3. I bought the many books at the book store. 4. I don't have any those books. 5. What those books do you have?

More Similar Questions