Q: What represents an unknown value?

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A variable

Variable.

x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.

A variable is usually used for that - for example, a single letter that represents the unknown quantity.

In mathematics, a variable is a representation, in the form of a letter, of a numerical value. Variables are traditionally used when the value it represents is either unknown or can vary.

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In mathematical expressions, a variable (a letter used to represent a certain value) represents an unknown or changeable value. It is often the variable x.

A variable

a variable

Variable.

x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.

It is unknown and it usually just represented as pi. It represents the ratio between the circumference and the diameter.

x= the unknown

A variable is usually used for that - for example, a single letter that represents the unknown quantity.

In mathematics, a variable is a representation, in the form of a letter, of a numerical value. Variables are traditionally used when the value it represents is either unknown or can vary.

The word "variable" represents an unknown number.

Usually x or n, but can be any letter.

x