Evaluating Algebraic Expressions

Front

What is an algebraic expression?

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An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 2x + 3 is an algebraic expression.

Front

What does it mean to evaluate an algebraic expression?

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To evaluate an algebraic expression means to substitute the values of the variables into the expression and perform the operations to find a numerical result.

Front

Evaluate: 2x + 5(y + z) when x=8, y=5, and z=-1.

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36

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32

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Back

38

Front

Evaluate: 2x + 5y - 3z if x = 4, y = 5, z = -2.

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39

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Back

-72

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often abbreviated as PEMDAS.

Front

What is a variable in algebra?

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A variable is a symbol, usually a letter, that represents an unknown value in an expression or equation. For example, in the expression 3x + 2, 'x' is the variable.

Front

What is a coefficient in an algebraic expression?

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A coefficient is a numerical factor that multiplies a variable in an algebraic expression. For example, in 4x, 4 is the coefficient.