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Algebra I

Compound Inequalities

Compound inequalities are multiple inequalities combined with the word AND or OR.

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The logic of AND

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Solving Compound Inequalities

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Sometimes textbooks will use the word 'union' in the place of the word 'and'. A union is where two sets of numbers overlap, so it's a little more correct. But for algebra we'll still use the word 'and' because it's easier to understand.