Writing Algebraic Expressions

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What is an algebraic expression?

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An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 2x + 3 is an algebraic expression.

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What does it mean to 'sum' in algebra?

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To 'sum' means to add. In algebra, when you see 'the sum of A and B', it means A + B.

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How do you represent '2 times the sum of B and 15' in algebraic form?

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2(B + 15)

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What does 'subtract a number from 10' mean in algebra?

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It means to take a variable (n) away from 10, represented as 10 - n.

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How do you express '9 plus a number' in algebra?

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It is expressed as 9 + n.

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What is the algebraic representation of '45 more than half of F'?

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It is represented as ½F + 45.

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How do you express 'six times the number of girls' in algebra?

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It is expressed as 6g, where g represents the number of girls.

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What is a variable in algebra?

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A variable is a symbol (often a letter) that represents an unknown number. For example, in the expression 3x, x is the variable.

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What does it mean to 'evaluate' an algebraic expression?

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To 'evaluate' means to calculate the value of the expression by substituting the variable with a number.

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What is the difference between an equation and an expression?

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An equation states that two expressions are equal, while an expression does not have an equality sign.