Evaluating Expressions with Substitution

Evaluate 3x + 8   if x = 2

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When you replace a variable with a value it is called...

• replacing

• substitution

• algebraic

• numerical

Evaluate the following expression. Show your work in your notebook!

x-10(y) when x=40 and y=2

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• 40

• -2

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• -3

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Evaluate 3t - 12 when t=10

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b² + 4
when b = 3

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Evaluate m² if m = 5

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3(2x + z) when x=8 and z=2

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