#20A Evaluating Expression with Substitution

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What is substitution in evaluating expressions?

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Substitution is the process of replacing a variable in an expression with a specific value to calculate the expression's value.

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39

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What is the formula for the area of a square?

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Calculate the area of a square with a side length of 15 inches.

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225 square inches

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44

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What does it mean to evaluate an expression?

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To evaluate an expression means to calculate its value by substituting the variables with their respective values.

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