A mathematical sentence that shows two expressions are equivalent.

A symbol used to represent a quantity that can change.

A mathematical sentence that shows the relationship between quantities that are not equivalent.

The set of whole numbers and their opposites.

A rule for evaluating expressions: first perform the operations in parentheses, then compute powers and roots, then perform all multiplication and division from left to right, and then perform all addition and subtraction from left to right.

A value or values that make an equation true.

Any number that can be expressed as a ratio of two integers.

An expression that contains at least one variable.

A pair of numbers that can be used to locate a point on a coordinate plane.

The point where the x-axis and the y-axis intersect on the coordinate plane; (0,0).

An equation that states that two ratios are equivalent.

A ratio that compares two quantities measured in different units.

A comparison of two quantities by division.

A fraction that contains one or more fractions in the numerator, the denominator, or both.