Parts of an Expression

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What is a coefficient in an expression?

Back

A coefficient is a number that is multiplied by a variable in an expression. For example, in the expression 9m, 9 is the coefficient.

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What is a variable in an expression?

Back

A variable is a symbol, often a letter, that represents an unknown value in an expression. For example, in the expression 3x + 2, x is the variable.

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What is a constant in an expression?

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A constant is a fixed value that does not change. For example, in the expression 4x + 5, 5 is the constant.

Front

What is a term in an expression?

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A term is a single mathematical expression that can be a number, a variable, or a combination of both, separated by addition or subtraction. For example, in 3a + 2b + 5, there are three terms: 3a, 2b, and 5.

Front

How many terms are in the expression 5x + 3y - 2?

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There are 3 terms in the expression: 5x, 3y, and -2.

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What does it mean to simplify an expression?

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

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What is the difference between a coefficient and a constant?

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A coefficient is a number that multiplies a variable, while a constant is a fixed number without a variable. For example, in 4x + 7, 4 is the coefficient and 7 is the constant.

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

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To identify the number of terms in an expression, count the number of separate parts that are added or subtracted. For example, in 2a + 3b - 4, there are 3 terms.

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What is the role of parentheses in an expression?

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

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What is an algebraic expression?

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An algebraic expression is a combination of numbers, variables, and operations (like addition, subtraction, multiplication, and division). For example, 3x + 4 is an algebraic expression.