Algebraic Expressions - Substitution

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables (like x or y), and operation symbols (like +, -, *, /).

Front

What does substitution mean in algebra?

Back

Substitution in algebra refers to replacing a variable with a specific value to evaluate the expression.

Front

Evaluate the expression 3ab when a = 3 and b = 4.

Back

36

Front

Evaluate the expression y + x - z when x = 3, y = -2, and z = -4.

Back

-3

Front

Evaluate the expression 4y when y = 3.

Back

12

Front

Evaluate the expression a + b when a = 3 and b = 4.

Back

7

Front

Evaluate the expression 2a when a = 3.

Back

6

Front

What is the value of a variable in an expression?

Back

The value of a variable is the number that it represents when substituted into the expression.

Front

What is the purpose of evaluating an expression?

Back

The purpose of evaluating an expression is to find its numerical value by substituting the variables with their respective values.

Front

If x = 5, what is the value of 2x + 3?

Back

13