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  2. NEMA enclosure types - Wikipedia

    en.wikipedia.org/wiki/NEMA_enclosure_types

    3X, 3RX, 3SX: X indicates additional corrosion protection; commonly used near salt water. 4 and 4X: Watertight. Must exclude at least 65 GPM of water from a 1-inch nozzle delivered from a distance not less than 10 feet for 5 min. Used outdoors on ship docks, in dairies, in wastewater treatment plants and breweries. X (as 4X) indicates ...

  3. Multiplication sign - Wikipedia

    en.wikipedia.org/wiki/Multiplication_sign

    The lower-case Latin letter x is sometimes used in place of the multiplication sign. This is considered incorrect in mathematical writing. This is considered incorrect in mathematical writing. In algebraic notation, widely used in mathematics, a multiplication symbol is usually omitted wherever it would not cause confusion: " a multiplied by b ...

  4. 4X - Wikipedia

    en.wikipedia.org/wiki/4X

    t. e. 4X (abbreviation of Explore, Expand, Exploit, Exterminate) is a subgenre of strategy-based computer and board games, [1][2][3] and includes both turn-based and real-time strategy titles. [4][5] The gameplay generally involves building an empire. [6] Emphasis is placed upon economic and technological development, as well as a range of ...

  5. List of 4X video games - Wikipedia

    en.wikipedia.org/wiki/List_of_4X_video_games

    Amplitude Studios. Fantasy. WIN, OSX. Endless Legend is a 4X turn-based fantasy strategy game by the creators of Endless Space and Dungeon of the Endless. 2014. Horizon [48] L3O. Sci-fi (Space) WIN.

  6. Algebra - Wikipedia

    en.wikipedia.org/wiki/Algebra

    Algebra. Elementary algebra studies which values solve equations formed using arithmetical operations. Abstract algebra studies algebraic structures, such as the ring of integers given by the set of integers together with operations of addition ( ) and multiplication ( ). Algebra is the branch of mathematics that studies certain abstract ...

  7. Polynomial - Wikipedia

    en.wikipedia.org/wiki/Polynomial

    is a horizontal line with y-intercept a0. The graph of a degree 1 polynomial (or linear function) f(x) = a0 + a1x, where a1 ≠ 0, is an oblique line with y-intercept a0 and slope a1. The graph of a degree 2 polynomial. f(x) = a0 + a1x + a2x2, where a2 ≠ 0. is a parabola. The graph of a degree 3 polynomial.

  8. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

  9. Like terms - Wikipedia

    en.wikipedia.org/wiki/Like_terms

    Typically, in a polynomial expression, like terms are those that contain the same variables to the same powers, possibly with different coefficients. More generally, when some variable are considered as parameters, like terms are defined similarly, but "numerical factors" must be replaced by "factors depending only on the parameters".