# What is a variable expression

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## How do you write the variable expression for: a quotient of 2 and the sum of a number and 3 ?

Expressions with two variables - Introduction to algebra - Algebra I - Khan Academy

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It may help you to read Introduction to Algebra first. An equation says that two things are equal. So people can talk about equations, there are names for different parts better than saying "that thingy there"! A Variable is a symbol for a number we don't know yet. It is usually a letter like x or y.

If you're seeing this message, it means we're having trouble loading external resources on our website. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Evaluating expressions with variables: exponents. Evaluating exponential expressions 2. Evaluating expressions with variables: temperature. Evaluating expressions with two variables. Example: Evaluating expressions with 2 variables.

To evaluate an algebraic expression you have to substitute each variable with a number and perform the operations included.
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An algebraic expression comprises both numbers and variables together with at least one arithmetic operation. A variable, as we learned in pre-algebra, is a letter that represents unspecified numbers. One may use a variable in the same manner as all other numerals:. To evaluate an algebraic expression you have to substitute each variable with a number and perform the operations included. Where 5 is called the base and 3 is called the exponent.

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## 5 thoughts on “What is a variable expression”

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2. Examples of evaluating variable expressions (video) | Khan Academy