Variable
The symbol is called DELTA and looks like a triangle. -----> Δ <----
x or any other variable
In the context of algebra, "4d" would typically be considered a numerical expression rather than a variable. A variable is typically a letter or symbol that represents an unknown quantity that can vary, while a numerical expression is a combination of numbers and mathematical operations. In this case, "4d" represents the product of the number 4 and the variable "d," making it a numerical expression.
It is calibrating.
x= the unknown
x
Variable
A variable is usually used for that - for example, a single letter that represents the unknown quantity.
a variable
A variable.
veribal
In maths the symbols x and n are usually used to represent an unknown quantity. These may be referred to as a variable.
I believe it is because Q represents 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.