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3. Which statements about variables are true? Select all that apply.

A. Only x can be used as a variable.
B. You cannot do mathematical operations with variables.
C. Any letter can be used as a variable.
D. Variables are used for numbers that haven't been defined yet.
E. Only one variable can be present in an equation.



Answer :

GinnyAnswer

Final answer:

Variables are letters representing unspecified numbers, allowing for the description of problems without specific values. Any letter can be a variable, and multiple variables in equations are permissible.


Explanation:

Variables are letters that represent general, non-specified numbers. They allow for the description of general problems without giving quantities, and they can represent numbers whose values are not yet known. Any letter can be used as a variable, and only one variable is not necessary in an equation.


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