Algebra is a type of math in which letters are used to represent numbers. Those letters, called variables, can also be terms in an expression. An algebraic expression contains numbers, operation symbols and variables. Take the algebraic expression 48 + n - 3. There are three terms (48, n and 3), two operations (addition and subtraction) and one variable (n). In an expression, a term is a single number, a variable or numbers and variables multiplied together.
How many terms are in the expression 5 - 3c + 21?
A
one
B
two
C
three
D
four