Algebraic Expressions Flashcard (3.1-3.2)

Front

What is a variable in an algebraic expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value. In the expression 5n + 3, 'n' is the variable.

Front

What is a numerical expression? Give an example.

Back

A numerical expression is a mathematical phrase that includes numbers and operations but no variables. Example: 3(2 + 7) - 10.

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a numerical factor that multiplies a variable. In the expression 5n + 3, '5' is the coefficient of 'n'.

Front

What does the term 'subtract' mean?

Back

To subtract means to take one quantity away from another. It is represented by words like difference, minus, less than, and decreased by.

Front

How do you evaluate the expression 9N when N=11?

Back

To evaluate 9N when N=11, substitute 11 for N: 9(11) = 99.

Front

What is an algebraic expression?

Back

An algebraic expression is a combination of numbers, variables, and operations (like addition, subtraction, multiplication, and division). Example: 4x + 7.

Front

What is the difference between an algebraic expression and a numerical expression?

Back

An algebraic expression contains variables, while a numerical expression contains only numbers and operations.

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the role of parentheses in algebraic expressions?

Back

Parentheses indicate which operations should be performed first in an expression. Example: In 3(2 + 7), calculate (2 + 7) first.

Front

What is the term for the number that is added or subtracted in an expression?

Back

The term is called a constant. In the expression 5n + 3, '3' is the constant.