Evaluating Algebraic Expressions

Front

What is an algebraic expression?

Back

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

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 according to the order of operations (PEMDAS/BODMAS).

Front

What does PEMDAS stand for?

Back

PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). It is the order of operations used to evaluate expressions.

Front

Evaluate: 2x + 3 + x² for x = 4.

Back

27

Front

Evaluate: 2 × 3³ + 7.

Back

61

Front

Evaluate: 2(a - 5) + 2 when a = 15.

Back

22

Front

Evaluate: 2r + 1 if r = 3.

Back

7

Front

What is the value of 6³ – 10 ÷ 5?

Back

214

Front

What is a variable in algebra?

Back

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

Front

What is a coefficient in an algebraic expression?

Back

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