22 terms

Absolute value

The absolute value of a real number, x, written |x|, is its distance from zero on the number line.

Additive inverse

Any number, a, is -a.

Algebraic expression

A mathematical phrase that contains one or more variables.

Coefficient

The numerical factor of a term.

Compound inequality

Joining two inequalities with the word and or the word or.

Constant

Quantities whose values do not change.

Constant term

A term with no variables.

Equation

A statement that two expressions are equal.

Evaluate

To evaluate an algebraic expression, substitute a number for each variable in the expression. Then simplify using the order of operations.

Extraneous solution

A solution derived from an original equation that is not a solution of the original equation.

Identity

An equation that is true for every value of the variable.

Inverse operations

Operations that undo each other.

Like terms

Terms that have the same variables raised to the same powers.

Literal equation

An equation that uses at least two different letters as variables.

Multiplicative inverse

Any nonzero number, a, is 1/a.

Numerical expression

A mathematical phrase that contains numbers and operation symbols.

Opposite

Any number, a, is -a.

Reciprocal

Any nonzero number, a, is 1/a.

Solution of an equation

All values of the variable that make the equation true.

Term

An expression that is a number, a variable, or the product of a number and one or more variables.

Variable

A symbol, usually a letter, that represents one or more numbers.

Variable quantity

Quantities who values change or vary.