If I use the chords E, D, C, A, A7, F, And G (not in that order) in a song what key is it in?

Why do people ls swap a rx7? #keeptherotteryalive

(i think my answer is a, am i correct? ) a pentagonal traffic sign is a sign. a. school crossing b. parking c. wrong way d. yield

Where does middle c get it’s name? a. it sits in the middle of a brass clef b. it sits in the middle of the grand staff c. if sits in the middle of the alto clef d.its sits in the middle of the treble clef