The branch of mathematics that deals with relationships between numbers, utilizing letters and other symbols to represent specific sets of numbers.
A number multiplied by a variable.
A number sentence that contains an equals symbol.
A mathematical phrase involving at least one variable and sometimes numbers and operation symbols.
Any mathematical sentence that contains the symbols > (greater than), < (less than), >= (greater than or equal to), <= (less than or equal to).
A pair of numbers, (x, y), that indicates the position of a point on a Cartesian plane.
To replace one element of a mathematical equation or expression with another.
A letter or symbol used to represent a number.