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  2. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [2] and released to the public in January 2007. [3] Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [4]

  3. Exercise (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Exercise_(mathematics)

    This is an extraordinarily strong concentration of mathematical education – up to 16 hours a week – in which elementary analytic geometry and mechanics, and recently infinitesimal calculus also, are thoroughly studied and are made into a securely mastered tool by means of many exercises.

  4. Category (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Category_(mathematics)

    Here hom(a, b) denotes the subclass of morphisms f in mor(C) such that dom(f) = a and cod(f) = b. Morphisms in this subclass are written f : a → b, and the composite of f : a → b and g : b → c is often written as g ∘ f or gf. such that the following axioms hold:

  5. Flu season claims lives of nine children in US as cases surge ...

    www.aol.com/flu-season-claims-lives-nine...

    The flu is surging in New York and across the US — and claimed the lives of five kids in the days before Christmas.. Positive tests climbed a whopping 12% for the week ending Dec. 21, according ...

  6. Djokovic says players have 'been kept in the dark' on Sinner ...

    www.aol.com/djokovic-says-players-kept-dark...

    Djokovic is the top seed in the Brisbane International this week, making his first appearance at the event since 2009. Djokovic says players have 'been kept in the dark' on Sinner, Swiatek doping ...

  7. 5 Phrases a Child Psychologist Is Begging Parents and ...

    www.aol.com/5-phrases-child-psychologist-begging...

    In the life of your child, you easily exchange thousands of words every day, or at the very least every week. And while many of these conversations may seem normal and even fairly inconsequential ...

  8. Child class - Wikipedia

    en.wikipedia.org/wiki/Child_class

    Child class may refer to: Subclass (computer science) Child-Pugh score This page was last edited on 28 December 2019, at 01:54 (UTC). Text is available under the ...

  9. NFL playoff scenarios: What if the Eagles, Lions and Vikings ...

    www.aol.com/sports/nfl-playoffs-theres-tie-no...

    The two No. 1's are the only teams that get a first-round bye in the playoffs, while every other playoff team must battle it out to make it to the next week. There's an interesting situation ...