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## Expressions that contain at least one variable

Algebraic expressions

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## Evaluating an algebraic expression by replacing each variable with a number

Order of operations

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## -3-2-1 0 1 2 3

Integers

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## 0,1,2,3,4,5, ...

Whole numbers

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## 1,2,3,4,5, ...

Natural numbers

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## A mathematical sentence containing one or more variables

Open sentence

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## Distance from 0 on a number line

Absolute value

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## The number that you get from the equation but is not true when you check

Extraneous solution

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## The solution set of an inequality can be expressed by

Set builder notation

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