128 because 128 times 2 is 256 children tickets and 256 plus 128 is 384
C because when you add 2 in one column you keep adding three to the other
<span>E[Y] = 0.4·1 + 0.3·2 + 0.2·3 + 0.1·4 = 2
E[1/Y] =0.4·1/1 + 0.3·1/2 + 0.2·1/3 + 0.1·1/4 = 0.4 + 0.15 + 0.0666 + 0.025?0.64
V[Y] =E[Y2]-E[Y]2= (0.4)·12+(0.3)·22+(0.2)·32+(0.1)·42-22= 0.4+1.2+1.8+1.6-4= 5-4 = 1</span>
Answer:36 divided by 3x is part a and 7 is part b
Step-by-step explanation:
Add all sides together to find the length of each side
