Answer:
-764.28
Step-by-step explanation:
Given the joint cumulative distribution of X and Y as

#First find
and probability distribution function ,
:

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

#We then calculate
:

Hence, the Var(X) is 764.28
Step-by-step explanation:
here's the answer to your question
Answer:
D. the lines never intersect
Step-by-step explanation:
Use the site cymath it helps a lot but X<0, X>1/8
Answer:
<h2>x = 27°</h2>
Step-by-step explanation:
From the question ( 4x + 7)° and [5(x - 4)]° are vertically opposite
Since vertically opposite angles are equal we can equate them to find x
That's
4x + 7 = 5(x - 4)
4x + 7 = 5x - 20
Group like terms
5x - 4x = 20 + 7
<h3>x = 27°</h3>
Hope this helps you