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Q: What is a symbol that stands for an unknown quantity is called?

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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

eat it i know you want it

' stands for PRIME

An unknown number represented by a letter or symbol is a variable.

x or any other variable

It is called a variable.

It is called a variable.

algebraic expression

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.

The symbol is called DELTA and looks like a triangle. -----> Δ <----

is called a variable or a literal constant, or informally an unknown.

That is called a variable. A letter is often used.

The symbol V stands for voltage.

Symbol

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

An unknown number is a variable and its symbol is usually in the form of a letter such as x or y

Be stands for Beryllium.

Atomic symbol

The chemical symbol Pb stands for "lead", Plum bum.

The astronomical symbol for the planet Uranus is the letter H. The letter stands for Herschel, who discovered Uranus in 1781.

The symbol Ca stands for the element Calcium.The symbol Ca stands for the element Calcium.

The symbols used are called variables.

a letter or symbol that stands for one or more numbers is a