Which two events are independent?
х
15
5
30
50
A
B
с
Total
Y
5
8
15
28
Z
10
7
5
22
Total
30
20
50
100
O A and X
OO
A and Y
O Band X
B and Y

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

faster, im not sure why but i know it is faster

i saw this question before, dont know the asnwer srry

step-by-step explanation:

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.