Whats the answer to 20 pls , show solving steps

Need on this geometry question. explain how you did it.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Your best friend told you that last week scientists disco y that las vegas is responsible for abrupt climate changes. which do you think is best way to research that recent discovery? an encyclopedia usgs internet site a book in the library your best friend’s parents for your ! ❤️