Proportions & Solving Proportions

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What is a proportion?

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A proportion is an equation that states that two ratios are equal.

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CCSS.7.RP.A.2A

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How do you solve a proportion?

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To solve a proportion, cross-multiply the terms and then isolate the variable.

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CCSS.6.EE.B.7

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What does it mean for two ratios to form a proportion?

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Two ratios form a proportion if their cross products are equal.

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CCSS.7.RP.A.2A

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CCSS.6.RP.A.3A

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9

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CCSS.7.RP.A.2B

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4

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CCSS.7.RP.A.2B

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No

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CCSS.7.RP.A.2A

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No

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CCSS.7.RP.A.2A

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27.6

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CCSS.7.RP.A.2C

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What is a ratio?

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A ratio is a comparison of two quantities by division.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2