A variable is a symbol that stands in for an unknown value in a mathematical expression. ... A term is a single number, variable, or a number and a variable multiplied together. A variable expression is a combination of terms and mathematical operations that contains at least one variable.

What is an example of variable expression?

A variable is a letter whose value is unknown to us. For example, x is our variable in the expression: 10x + 63. ... For example, 10 is the variable in the expression 10x + 63. A constant is a term that has a definite value.

What is the difference between a variable and an expression?

The variable w represents the width of the rectangle. ... A constant, unlike a variable, is a quantity that does not change. A constant is often a number. An expression is a mathematical phrase made up of a sequence of mathematical symbols.