Ask your own question, for FREE!
Mathematics 21 Online
OpenStudy (anonymous):

The first and fourth terms of a proportion are called the means. always sometimes never

OpenStudy (anonymous):

never

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!