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By definition, what is an expression in algebra?
AA number, a variable, or a combination joined by symbols
BTwo expressions joined together by an equal sign
CA letter whose value is always equal to zero
DA statement that must contain an inequality symbol
Answer & Solution
Correct answer: A. A number, a variable, or a combination joined by symbols
1. The definition allows an expression to be as simple as a single number or a single variable.
2. It also allows a combination of numbers and variables joined by operation symbols.
3. What the definition never requires is an equal sign, which is what separates an expression from an equation.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 1 "Foundations", section 1.2 Use the Language of Algebra_
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