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X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
It is called a variable.
No, infinity is not a digit. It is a concept used in mathematics to represent a quantity that is larger than any number. In the decimal system, digits are the symbols used to represent numbers (0-9).
A vector is a quantity with magnitude and direction. Since force has magnitude and direction, it is a vector
Nothing specifically is "done" to the variable; variables are generally used to represent either:* A quantity that is initially unknown (and should be solved for), or * A quantity that can be anything - to analyze what happens no matter what a certain value is.
A line graph is often used to represent a set of data values in which a quantity varies with time
Unknonwn quantity is any variable a,b,c or x,y
A variable
Variable
It is called a variable.
A number is an arithmetic value used to represent quantity.
X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
It is called a variable.
They take the place of an unknown quantity. They can change values, thus they are called variables, their quantity varies.
A letter used to represent a number is a variable of sometimes a constant.
The letter 'I' is used to represent current. Its SI units are the ampere,(amps),(A).
In maths the symbols x and n are usually used to represent an unknown quantity. These may be referred to as a variable.