Purpose of [^\x20-\x7E] in regular expressions

Question

 [^\\x20-\\x7E]

I saw this pattern used for a regular expression in which the goal was to remove non-ascii characters from a string. What does it

Answer 1

It means "anything that isn't a character code in the hexadecimal range 0x20 to 0x7E, i.e. 32 to 126".