Day 1 of seeing if anyone will buy me a psn gift card (if u do u get brainliest and thanks + alot of points

Ajeweler designing a pin has decided to use five stones chosen from diamonds, rubies, and emeralds. in how many ways can the stones be selected?

Larry sent an email to andy. andy didn't open larry's email but still understood what the message was. how did andy determine the message without opening the email?

How can you know if the person or organization providing the information has the credentials and knowledge to speak on this topic? one clue is the type of web site it is--the domain name ".org" tells you that this site is run by a nonprofit organization.