Identifying Parts of an Expression

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change. For example, in the expression 3x + 5, the number 5 is a constant.

Front

What is a variable in an expression?

Back

A variable is a symbol used to represent an unknown value. For example, in the expression 2x + 3, 'x' is a variable.

Front

What is a coefficient?

Back

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

Front

What is an expression?

Back

An expression is a combination of numbers, variables, and operators (like + and -) that represents a value but does not have an equal sign.

Front

How many terms are in the expression 5a + 3b - 2?

Back

There are 3 terms in the expression: 5a, 3b, and -2.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with specific numbers.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equal sign, while an equation does. For example, 3x + 2 is an expression, while 3x + 2 = 5 is an equation.

Front

Identify the coefficient in the expression 7y + 4.

Back

The coefficient is 7, which multiplies the variable y.

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

What is the role of parentheses in an expression?

Back

Parentheses indicate which operations should be performed first in an expression.