An unknown number.
in maths it denotes as10
The SI nano- prefix means x 10-9
It doesn't stand for bananas.
3000
metre
elementary maths
It doesn't "stand for" anything. And wrong category.
maths economics comers
LCM stand for Least Common Multiple
Answer In 1637, a very important book was published in France by Rene Descartes. he used the letter 'x', 'y','z' to stand for the unknown amounts in his maths problems. his book became very popular. other mathematicians followed his practice & started using the letter 'x' to denote the unknown.
Base times Height
x to x +25