Every key signature that has flats has a B flat. These keys are:
-F Major (Also D Minor and G Dorian)
Has only B flat.
-B flat Major (Also G Minor and C Dorian)
Has B flat and E flat.
-E flat Major (Also C Minor and F Dorian)
Has B flat, E flat, and A flat.
-A flat Major (Also F Minor and B flat Dorian)
Has B flat, E flat, A flat, and D flat.
-D flat Major (Also B flat Minor and E flat Dorian)
Has B flat, E flat, A flat, D flat, and G flat.
-G flat Major (Also E flat Minor and A flat Dorian)
Has B flat, E flat, A flat, D flat, G flat, and C flat.
-C flat Mojor (Also A flat Minor and D flat Dorian)
Has B flat, E flat, A flat, D flat, G flat, C flat, and F flat.
In a key signature, one flat is the note B flat.
The key signature that has B flat, A flat, E flat and D flat is Concert A flat Major.
Assuming the key signature has only one flat (B Flat) then the key is either F Major, or D minor.
The key signature of the F flat major key has six flats: B flat, E flat, A flat, D flat, G flat, and C flat.
The key signature of the C minor scale has three flats: B flat, E flat, and A flat.
In a key signature, one flat is the note B flat.
The key signature for F major has one flat (B flat) , while the key signature for F minor has four flats (B flat, E flat, A flat, and D flat).
The key signature that has B flat, A flat, E flat and D flat is Concert A flat Major.
Assuming the key signature has only one flat (B Flat) then the key is either F Major, or D minor.
The key signature with only a B-flat is either F major or D minor.
A flat lowers the note by a semitone. As a key signature, a single flat indicates the key of F, meaning your B should be flat. Two flats are E and B, meaning the key is therefore B flat. B, E and A flat indicate the key of E flat ... and so on.
There is no key signature that has Bb and C#.
The key signature of the F flat major key has six flats: B flat, E flat, A flat, D flat, G flat, and C flat.
That is the signature for the key of Db. Or, it's relative minor, Bb minor.
B flat and E flat
One flat, B-flat.
No key signature has two of the same flat or sharp.