Writing Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 3x + 5 is an algebraic expression.

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What does it mean to subtract a number from another number?

Back

To subtract a number from another number means to take away the second number from the first. For example, subtracting 3 from 10 gives you 10 - 3.

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How do you represent '45 more than half of F' in algebraic form?

Back

The expression is ½F + 45.

Front

What is the equation for Maria's bank account situation if she has $100 and deposits d dollars to have $280?

Back

The equation is 100 + d = 280.

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How do you find the number of slices of pizza each student ate if 50 students ate 150 slices?

Back

The equation is 50p = 150, where p is the number of slices each student ate.

Front

What does 'a number added to 19' look like in algebraic form?

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The expression is 19 + n.

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What is a variable in algebra?

Back

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

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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 is a combination of numbers, variables, and operations without an equality sign.

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How do you write 'twice a number' in algebraic form?

Back

The expression is 2n, where n is the number.

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What does it mean to evaluate an expression?

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