Answer:
4n + n + 6 + 4n + n + 6 
10n + 12 
he ought to have added the Ns 
cc: He is supposed to add the coefficients of N 
 
        
             
        
        
        
Answer:
12 Bus Tickets
Step-by-step explanation:
18 / 4.50 = 4 x 3 Bus tickets = 12 Tickets
 
        
             
        
        
        
Answer:
1
2
6
Step-by-step explanation:
1/2 +1/2 =1
length 1/2 ×4=2 
wide 1/2 ×3 =1 1/2
height 1/2×3= 1 1/2
 
        
             
        
        
        
Answer:
-764.28
Step-by-step explanation:
Given the joint cumulative distribution of X and Y as 

#First find  and probability distribution function ,
 and probability distribution function , :
:

#Have determined the probability distribution unction , , we calculate the Expectation of the random variable X:
, we calculate the Expectation of the random variable X:

#We then calculate  :
:

Hence, the Var(X) is 764.28