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Q: What do you call a symbol used to represent the unknown quantity in an equation?

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In maths the symbols x and n are usually used to represent an unknown quantity. These may be referred to as a variable.

x

Variable

a variable

A variable

Variable

X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.

b

It is called a variable.

mnemonic * * * * * A variable

It is called a variable.

reactant

Triangle (Or symbol Capital delta) is generally used to represent heat

Letters and symbols are used in equations to represent quantities, sometimes known or unknown. For example the symbol Ï€ (pi) represents the constant 3.14â€¦ and is unchanging. X or Y in an equation represent unknown terms that may vary depending on the equation, and other variables in the equation. There are numerous examples of both symbols and letters used in mathematical equations, but almost always they are either referring to a known constant term that is more simply expressed as a symbol, or an unknown or general term yet to be concretely determined.

fog

If you mean the letter x, then it represents an unknown quantity in an equation. If you mean the multiplication symbol, then it represents... well... the operation of multiplication. If it's kind of a weird, script-looking x, it might be a Greek chi, which is used in statistics to represent a particular metric for determining how well a given curve fits a set of data points.

The symbols used are called variables.

It is a variable and is expressed as a letter as for example it could be x or y

Nobody 'invented' it... letters are often used in maths to signify an unknown quantity.

There is no equation for Sulfur, it is an element with the symbol S and that is all. Equations are used to represent chemical reactions and formulas are used to represent chemical compounds. Elements just have a symbol because they only contain one sort of atom.

VARIABLE. When this variable has a fixed number assigned to it and does not change, it is called a "fixed variable".

A number represents a quantity of units or items. A numeral is a symbol used to represent a number.

If you are talking about math then its usually " x " but if that is already use in the expression and you want to use another symbol to represent a DIFFERENT number then you can use y or a or so on.

Hi,The symbol for amps, or amperes, is A. though in the equation V=IR, current is represented by an I. the proper symbol is A.CommentDo not confuse the symbols for quantities and for units of measurement. Current is a quantity, and its symbol is an italic I. The ampere is a unit, and its symbol is an upright A.

The chemical symbol (not equation) of lithium is Li.