Parts of an Expression

Front

What is a coefficient in an expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression. For example, in 4x, 4 is the coefficient.

Front

What is a constant in an expression?

Back

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

Front

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

Back

Count the number of separate parts in the expression that are added or subtracted. For example, in 3a + 2b + c + 100, there are 4 terms.

Front

What is an algebraic expression?

Back

An algebraic expression is a combination of numbers, variables, and operations. For example, 5x + 3 is an algebraic expression.

Front

How many coefficients are in the expression 2x + 3y + 4?

Back

There are 2 coefficients: 2 and 3.

Front

What is the difference between a term and a factor?

Back

A term is a single part of an expression, while a factor is a number or variable that is multiplied together. For example, in 3xy, 3, x, and y are factors, and 3xy is a term.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to combine like terms and reduce it to its simplest form. For example, 2x + 3x simplifies to 5x.

Front

What is a variable in an expression?

Back

A variable is a symbol, usually a letter, that represents an unknown value. For example, in the expression 2x + 5, x is the variable.

Front

How do you find the coefficient of a variable in an expression?

Back

The coefficient of a variable is the number that is multiplied by the variable. For example, in 4y, the coefficient of y is 4.

Front

What is the role of parentheses in an expression?

Back

Parentheses indicate which operations should be performed first in an expression. For example, in (2 + 3) × 4, you add 2 and 3 before multiplying by 4.