What is a variable in algebra?

A variable is a symbol, often a letter, that represents a number in an expression or equation. For example, in the expression 2x + 3, x is a variable.

What does it mean to substitute in algebra?

Substituting means replacing a variable in an expression with a specific value.

What is the difference between an expression and an equation?

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.

What is the order of operations in mathematics?

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 remembered by the acronym PEMDAS.

What is a coefficient in an algebraic expression?

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

Evaluating Algebraic Expressions Flashcards

Student preview

14 questions

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1.

FLASHCARD QUESTION

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 3x + 5 is an algebraic expression.

2.

FLASHCARD QUESTION

Front

How do you evaluate an algebraic expression?

Back

To evaluate an algebraic expression, substitute the values of the variables into the expression and perform the operations.

3.

FLASHCARD QUESTION

Front

Evaluate the expression for n = 2 and p = 7: np = ?

Back

14

4.

FLASHCARD QUESTION

Front

Evaluate $r + s$ at $r = 4$ and $s = 1$ .

Back

5

5.

FLASHCARD QUESTION

Front

Evaluate 21 + 7x when x = 2.

Back

35

6.

FLASHCARD QUESTION

Front

Evaluate $p^{10}$ at $p = 2$ .

Back

1024

7.

FLASHCARD QUESTION

Front

Evaluate 4y + 7 if y = 3.

Back

19

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