# What is an expression that contains at least one variable?

An algebraic expression is a type of expression that contains a variable or variables.

### What do you call replacing a variable in an expression by a number?

A variable is a letter that represents a number. An expression that contains at least one variable is called variable expression, also called algebraic expression. A variable expression has one or more terms. A term is a number, a variable, or a product of numbers and variables. For example, 3(x^2)y + 2xy + x - 7 is a variable expression, where you have 4 terms. When working with variable expression, you often use the substitution…

### What is the Type of algebraic expressions and give two examples?

A variable is a letter that represents a number. A n expression that contains at least one variable is called a variable expression or an algebraic expression.A variable expression has one or more terms. A term is a number, a variable, or a product of numbers and variables. An algebraic expression consisting of only one term is called a monomial (3x, xy, 2y, xyz); of two terms is called a binomial (x + y, x^2…