variable
symbol, usually a letter, that represents the value of a variable quantity
term
number, variable, or the product of a number and variable(s)
algebraic expression
mathematical phrase that includes one or more variables
coefficient
number in front of the variable
constant
term with no variable
evaluate
find the value of an expression when the variable is replaced by a given number
real number system
the set of rational and irrational numbers together
absolute value
the distance a number is from zero on a number line
additive inverses
a number and its opposite
numerical expression
an expression that contains only numbers and operations
square root
one of two equal factors of a number
like terms
terms that have the same variable factors