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1.2: Expressions with One or More Variables

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

algebraic

The word algebraic indicates that a given expression or equation includes variables.

Algebraic Expression

An expression that has numbers, operations and variables, but no equals sign.

Evaluate

To evaluate an expression or equation means to perform the included operations, commonly in order to find a specific value.

Exponent

Exponents are used to describe the number of times that a term is multiplied by itself.

Expression

An expression is a mathematical phrase containing variables, operations and/or numbers. Expressions do not include comparative operators such as equal signs or inequality symbols.

Order of Operations

The order of operations specifies the order in which to perform each of multiple operations in an expression or equation. The order of operations is: P - parentheses, E - exponents, M/D - multiplication and division in order from left to right, A/S - addition and subtraction in order from left to right.

Parentheses

Parentheses "(" and ")" are used in algebraic expressions as grouping symbols.

substitute

In algebra, to substitute means to replace a variable or term with a specific value.

Trapezoid

A trapezoid is a quadrilateral with exactly one pair of parallel opposite sides.

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Date Created:
Sep 26, 2012
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Apr 11, 2016
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MAT.ALG.142.1.L.2