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Posted by on Tuesday, August 16, 2011 at 11:35am.

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 - , Tuesday, August 16, 2011 at 12:12pm

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

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

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