I still don't get it evaluating expressions

The video tutorial provides a review of numeric and algebraic expressions, explaining the concept of variables as unknowns in algebraic expressions. It demonstrates how to evaluate expressions by substituting different values for the variable X, using examples to illustrate the process. The tutorial emphasizes understanding the flexibility of variables and the method of evaluating expressions by plugging in given values.

What is a numeric expression? Provide an example.

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Explain the concept of a variable in algebraic expressions.

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How do you evaluate an expression when given a specific value for a variable? Illustrate with an example.

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What happens when you substitute a negative value for a variable in an expression? Provide an example.

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Describe how to handle fractions when evaluating expressions. Give an example.

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