Answer:
The mean and standard devaition of W are 6 and 31 respectively.
Step-by-step explanation:
Given that:
W = 7 + 2X
Variance (W) = Variance(7 + 2X)
For a term constant term, the variance is zero.
So;

W = 4 × Var(X)
W = 4 × (SD (X))²
W = 4 × (3)²
W = 4 × 9
W = 36
Thus, Variance (W) = 36
The standard deviation of W = 
W = 
W = 6
Also;
E(W) = E(7 +2 X)
E(W) = 7 + 2 × E(X)
where;
mean X = 12
E(W) = 7 + 2(12)
E(W) = 31
Thus, the mean and standard devaition of W are 6 and 31 respectively.
Answer:
1)9984 and 2) 756
Step-by-step explanation:
624
16
6x4=24
add the 2 on top
6x2=12+2=14
add the one on top
6x6=36+1=37
add a zero and now
1x4=4
1x2=2
1x6=6
add them up and you get 9984
Now for the second question
6,048 divided by 8
8 divided by 8=1
8 divided by 2 =2
8 divided by 6=1.3
and I got 756
Answer:
125
Step-by-step explanation:
1. 180-90-35 = 55
2. 180-55 = 125
Answer:
35 units^2.
Step-by-step explanation:
Area = base * altitude
= 7 * 5.