Evaluating Algebraic Expressions Using Substitution

Front

What is substitution in algebra?

Back

Substitution is the process of replacing a variable with a number or another expression to evaluate an algebraic expression.

Front

What is the first step in evaluating the expression 12 ÷ 6 (3) + 8?

Back

The first step is division.

Front

Evaluate 2r + 1 when r = -3.

Back

-5

Front

What is the value of b² + 4 when b = 3?

Back

13

Front

Evaluate bc + 5a when a = 3, b = 4, and c = -6.

Back

-9

Front

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

Back

22

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with given numbers.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

If a = 2 and b = 3, what is the value of 3a + 4b?

Back

18

Front

What is the result of evaluating 5x - 3 when x = 4?

Back

17