In the order of flats in key signatures, even if the melody skips the B-flat, the key would contain it, because there is no such key with only an E-flat.
The key with three flats (Bb, Eb, Ab) is the key of Eb.
Bb and Eb
No key signature could have only Eb and Gb, but some include those two e.g. Db Major, Gb Major, Bb minor and Eb minor.
Eb major/C minorAb major/F minorDb major/Bb minorGb major/Eb minor
If you mean while you're looking at a song, usually the song starts and ends with the note of the key it's in.If you mean how do you tell the key name, you look at the second to last flat and that is the name of the key. This works with all except F major (one flat, Bb) and only with majors.Eb major. 3 flats (Bb, >>EbDb
That would be C minor, because often B natural is used instead of B flat.
It depends which Saxophone: soprano is in Bb, alto - Eb, tenor - Bb, baritone - Eb. they just sort of take it in turns with Bb and Eb!! (Also sopranino - Eb, soprillo - Bb and bass - Bb)
The key with three flats (Bb, Eb, Ab) is the key of Eb.
Eb Eb Eb Bb C C Bb G G F F Eb Bb Eb Eb Eb Bb C C Bb G G F F Eb Bb Bb Eb Eb Eb Bb Bb Eb Eb Eb Eb Eb Eb Eb Eb Eb Eb Eb Eb Bb C C Bb G G F F Eb Bb Bb C Bb D Eb
Bb Eb Bb Eb Bb Eb Bb Dm7 Gm7 Cm7 F7 Bb Eb Bb Eb Bb Eb Bb
Bb and Eb
Bb Bb C Bb Eb D Bb Bb C Bb F Eb Bb Bb Bb G Eb D C Ab Ab G Eb F Eb
Bb, Eb and Ab
Bb Bb C Bb Eb D Bb Bb C Bb F Eb Bb Bb G F Eb D C Eb Eb D Bb C Bb
It's not too bad, there's only three flats in the key signature; Bb, Eb, and Ab.
Bb, Bb, C, Bb, Eb, D Bb, Bb, C, Bb, F, Eb Bb, Bb, Bb(up an octave), G, Eb, D, C Ab, Ab, G, Eb, F, Eb
Bb, Bb, C, Bb, Eb, D Bb, Bb, C, Bb, F, Eb Bb, Bb, Bb(up an octave), G, Eb, D, C Ab, Ab, G, Eb, F, Eb