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Mathematics

Of or pertaining to the study of the measurement, properties, and relationships of quantities and sets, using numbers and symbols.

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Mathematics > Algebra

elimination

Mathematics; Algebra

A method of solving a system of equations by using addition or subtraction to eliminate one of the variables in order to solve for the other variables.

quadrilateral

Mathematics; Algebra

A quadrilateral is a polygon with four sides.

perpendicular lines

Mathematics; Algebra

Lines with slopes that are negative reciprocals.

average

Mathematics; Algebra

A number that represents the characteristics of a data set.

variable

Mathematics; Algebra

A quality which can change. This may be represented by a letter in an equation.

equation

Mathematics; Algebra

A mathematical sentence which expresses the equality of two expressions. 3 + x = 5, 2x = 4

expression

Mathematics; Algebra

A combination of symbols which are 'well-formed' in accordance with the rules of maths. One expression makes up one side of an equation.