Q:

What does X stand for in mathematical functions?

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Quick Answer

In mathematical functions, the letter "x" is used as a variable, meaning it's used in place of an unknown value or values. The letter "x" is commonly used to represent a variable, a tradition that started with the French mathematician René Descartes in the 17th century.

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Full Answer

A variable of unknown value can be demonstrated by the equation 2 + x = 6. In this example, x has the value of 4. Likewise, a variable with a variety of values can be demonstrated by the equation 2 + x = y. The value of y, a dependent variable, changes as the independent variable x changes. If x = 3, then y = 5.

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