math freshman

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4 Terms

1
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What is a variable?

A symbol, usually a letter, that represents a quantity that can change or vary. For example, in the expression 3x + 5, x is the variable.

2
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What is an algebraic expression?

A mathematical phrase that can contain numbers, variables, and operation symbols (like +, -, times, div), but no equality or inequality signs. Example: 2y^2 - 7

3
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What is the Order of Operations (PEMDAS)?

The standard order to perform mathematical operations to ensure a single, consistent result: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often remembered by the acronym PEMDAS or Please Excuse My Dear Aunt Sally.

4
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What is an equation?

An equation is a mathematical statement that shows two expressions are equal. It always contains an equals sign (=). Example: 2x + 1 = 9