Find the value of x. A
12x - 9
G
10x + 5
B
9x + 14
F136
1330
C
10x
10x + 9
E
D

Step-by-step explanation:

12x-9+10x+5+9x+14+136+133+10x+10x+9=900degree

41x+297=900 degree

x=900-297/41

x=603/41

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.