8.14a Algebraic Expressions Substitution

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

What does substitution mean in algebra?

Back

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

Front

If y = 7, what is the value of 2(y + 4)?

Back

22

Front

If a = 4 and b = 6, what is the value of 3a + 5b?

Back

42

Front

What is the sum of a, b, c, and d if a = 2, b = 3, c = 4, and d = 5?

Back

14

Front

If a = 4, b = 5, and c = 6, what is the value of 2c - a - b?

Back

3

Front

If a = 6 and b = 7, what is the value of 15 - a - b?

Back

2

Front

What is the value of an expression?

Back

The value of an expression is the result obtained after substituting the variables with their respective values and performing the operations.

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.

Front

What is the difference between an equation and an expression?

Back

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