Ask your own question, for FREE!
Mathematics 15 Online
OpenStudy (anonymous):

is '123-45-6789' a valid string?

OpenStudy (anonymous):

1234567899*0#123456789#

OpenStudy (anonymous):

Yes...

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!