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# Algebra Glossary - A a|b|c|d|e|f|g|h|i|l|m|n|o|p|q|r|s|t|u|v|w|x|y|z

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# absolute value:

The distance from the origin to the coordinate x.

# absolute value of a complex number:

The absolute value of a complex number a + bi is the square root of a square plus b square.

# additive inverses:

Pairs of real number that have the sum 0.

# additive inverse of a matrix:

For each matrix A, there is a matrix -A(the additive inverse of A), such that A + (-A) = Z.

# algebraic expressions:

Expressions that are made up of variables, numbers, grouping sym- bols, operation signs, and exponents.

# amplitude:

Half the difference between the maximum and minimum values of a periodic function.

# angle or depression:

An angle that measures between 0' and 90' formed by a horizontal ray and a ray from the observer to the object observed below.

# angle of elevation:

An angle that measures between 0 and 90 formed by a horizontal ray and a ray from the observer to the object observed above.

# arithmetic mean:

The sum of the num- bers in a set divided by the number of numbers in the given set.

# arithmetic means:

Terms of an arithmetic se- quence that are between two given terms.

# arithmetic sequence:

For each positive inte- ger n, the sequence with the first term a, and nth term a, is an arithmetic sequence if and only if an = a1 + (n - 1)d.

# arithmetic series:

The indicated sum of the terms of an arithmetic sequence.

# asymptotes (of a hyperbola):

The lines within which the branches of the hyperbola lie, and which are approached by the branches  as |x| increases.

# augmented matrix:

The coefficient matrix for a system of linear equations with a final column included for the constants of the equations.

# axis of symmetry:

A line in the plane of a graph such that the part of the graph on one side of the line is a reflection of the part on the other side.

Note: The terms in this collection may not be entirely accurate.
They are for reference only.