47. Solve for x A. sin x = cos 55°
B. sin 22° = cos x
C. Cos 45º = sin x
D. Sin (3x-1) = cos(17°)
E. Cos (2x + 5) = sin (x + 3)º
F. Sin (Ex)° = cos (x)

ans a 55

Step-by-step explanation:

47. Solve for x

A. sin x = cos 55°

B. sin 22° = cos x

C. Cos 45º = sin x

D. Sin (3x-1) = cos(17°)

E. Cos (2x + 5) = sin (x + 3)º

F. Sin (Ex)° = cos (x)

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

i hope this is what you were looking for.

see attached graph