Yes
And even in the same program!
Yes, it is possible to have more than one native language.
What is a person called who can speak more than one language?
No. If an input in a function had more than one output, that would be a mapping, but not a function.
No. If the function has more than one x-intercept then there are more than one values of x for which y = 0. This means that, for the inverse function, y = 0 should be mapped onto more than one x values. That is, the inverse function would be many-to-one. But a function cannot be many-to-one. So the "inverse" is not a function. And tat means the original function is not invertible.
A person who speaks more than one language is called a polyglot.
A person who knows more than one language is called a multilingual individual.
who?
A person who speaks more than one language is commonly referred to as a polyglot.
There is only one Russian language, but in Russia there are many nationalities (more than 100) and many languages.
yes
Yes, because if you work or study in a foreign country you need the country's language for daily life. Also, you are more likely to get a job in certain jobs if you can speak more than one language.
No. A function has only one output per input.