Parts of an Expression

Front

What are variables in an expression?

Back

Variables are symbols (like x, y, a, s, t) that represent unknown values.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change, such as the number 7 in the expression 3x + 2y + 7.

Front

How do you identify the number of constants in an expression?

Back

Count the fixed values in the expression that do not change, such as in 9m + 6 - 2n + 5, there are 2 constants: 6 and 5.

Front

What is a term in an expression?

Back

A term is a single mathematical expression that can be a number, a variable, or a combination of both, separated by + or - signs.

Front

How do you determine the number of terms in an expression?

Back

Count the number of distinct parts separated by + or - signs in the expression.

Front

What is the difference between a variable and a constant?

Back

A variable can change and represent different values, while a constant remains the same.

Front

Can an expression have both variables and constants?

Back

Yes, an expression can contain both variables (like x and y) and constants (like 5 and 7).

Front

What is the role of coefficients in an expression?

Back

Coefficients are the numerical factors that multiply the variables, such as 3 in 3x.

Front

How do you simplify an expression?

Back

Combine like terms and perform any arithmetic operations to reduce the expression to its simplest form.

Front

What is a polynomial?

Back

A polynomial is an expression that consists of variables raised to whole number powers and their coefficients, such as 3x^2 + 2x + 1.