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 the expression 9m, 9 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 4y + 2, the number 2 is a constant.

Front

What are variables in an expression?

Back

Variables are symbols (usually letters) that represent unknown values. In the expression 3x + 9, x is a variable.

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. For example, in 9m + 3n + 4, the terms are 9m, 3n, and 4.

Front

What does it mean for a letter to represent a number?

Back

When a letter represents a number, it is called a variable. For example, in the expression x + 5, x is a variable that can take on different values.

Front

Identify the coefficient in the expression 7a + 2b.

Back

The coefficient of a is 7 and the coefficient of b is 2.

Front

Identify the constant in the expression 5x + 10.

Back

The constant in the expression is 10.

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

In the expression 4x + 3y + 5, how many terms are there?

Back

There are three terms: 4x, 3y, and 5.

Front

What is the role of coefficients in algebraic expressions?

Back

Coefficients indicate how many times a variable is multiplied. For example, in 5x, the coefficient 5 shows that x is multiplied by 5.