Mastering Expressions and Variables

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Translate the phrase "Twice a number z decreased by 4" into an algebraic expression.

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Front

Translate the phrase "The difference between a number k and 5" into an algebraic expression.

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What is a variable in algebra?

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A symbol used to represent an unknown value, often denoted by letters like x, y, or z.

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What is an expression in mathematics?

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A combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

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What does it mean to simplify an expression?

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To reduce it to its simplest form by combining like terms and performing operations.

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What is the distributive property?

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A property that states a(b + c) = ab + ac, allowing you to multiply a single term by two or more terms inside a set of parentheses.

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What are like terms?

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Terms that have the same variable raised to the same power, which can be combined by addition or subtraction.