Magandang umaga?Is It means "how are you everyone"?
I never learn Tagalog yet, so please someone help me to learn it.
#Sorry about my English

Question

Answer

*how are you everyone = Kumusta kayong lahat... :)

Answer

Magandang umaga sa inyo or Magandang umaga sa inyong lahat
- Good morning everyone!

Magandang araw sa inyo/ sa inyong lahat ! 
- Hello everyone/ everybody!

Kamusta kayo(ng) ( lahat) ?
- How are you(- all) ?  ( inf. plural)

Kamusta ka? 
- How are you? ( informal)

Kumusta po sila? 
- How are you? ( formal)

Answer

nope..its "good morning"..

how are you in filipino is "kumusta kayong lahat?"