# 1.8: Evaluate Variable Expressions with Given Values

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**Practice**Polynomial Expression Evaluation

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constant

A constant is a value that does not change. In Algebra, this is a number such as 3, 12, 342, etc., as opposed to a variable such as*x, y*or

*a*.

Exponent

Exponents are used to describe the number of times that a term is multiplied by itself.Variable

A variable is a symbol used to represent an unknown or changing quantity. The most common variables are a, b, x, y, m, and n.Variable Expression

A variable expression is a mathematical phrase that contains at least one variable or unknown quantity.### Image Attributions

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Learn to evaluate variable expressions with given values for the variables.

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Date Created:

Dec 19, 2012
Last Modified:

Sep 14, 2016
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