Usually in algebra the term "unknown" is used for a variable ( commonly designated as x ) you are trying to solve for. For instance the mathematical expression 2 + x = 5 may be presented to the student as a problem. The answer is to solve for the unknown or x. The solution would be x = 3
If you mean Unkown as in the pokemon, you can't.
Girls Only Man Unkown Kewl?
A expression in maths is a collection of terms without an equality sign.
joe perrry 59 steven tyler 61 joey unkown brad unkown tom unkown
division
What symbol
Related to.
Adding
"tenth"
direction
circle
The mean is usually the arithmetic mean - there are other means in maths. For a set of numbers, the arithmetic mean is the sum of the numbers divided by the number of numbers.