Answer:
x=-1 1/2,x=-1.5
Step-by-step explanation: x=-3/2
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
Answer:
10x . . . . . (Note the sign of the middle term is negative. 10x goes in the box.)
Step-by-step explanation:
The sum of the two roots is ...
... (5 -3i) +(5 +3i) = 10
In a quadratic with leading coefficient 1, the coefficient of the 1st-degree term is the opposite of the sum of the roots. Here, that means the middle term is -10x. The minus sign is given, so the answer is 10x.
_____
<em>How Do We Know?</em>
When "a" and "b" are roots of a quadratic in x, it has factors (x -a)(x -b). The product of those two factors is ...
... (x -a)(x -b) = x² -(a+b)x +ab
Here, that means the product of the factors (5 -3i)(5 +3i) is ab = 34, which it is. Their sum is (a+b) = 10, so the x-term is -(a+b)x = -10x.
Answer:
This is a bit confusing for me but here we go.
1x110
10x11 and
i don't really know the third
Step-by-step explanation:
Answer:
true
Step-by-step explanation: its true 4 x 1y =4y then you multiply that 3 with the four bc you do the same for both sides it will look the same
