Answer:
f(x)=1
Step-by-step explanation:
Because Its right
Answer:
2(5+7)
Step-by-step explanation:
2 times any equation is 2(equation) and our equation is the sum of 5 and 7 which means 5 plus 7, therefore our equation is 2(5+7)
I assumed that 3 households are sampled.
Now, is the number in each of these households equal to 1, 3 and 8 people?
Next, the question says, samples of n=2 are randomly selected (with replacement) from these 3.
So are sample space is
11
13
31
33
18
81
38
88
83
88
This is done 9 times.
Is that how you understand the problem?
When they select the household with only 1 person, the variance is 0
When they select the household with 8 people, they variance will be from a discrete uniform distribution
Similarly for household with 3 individuals.
Answer:
x-y = 7 …(1)
xy = 137 …(2)
Square (1) to get x^2 +y^2 - 2xy = 49, or
x^2 +y^2 = 2xy + 49 = 2*137 + 49 = 323 + 49 = 372.
The sum of the squares of the two numbers is 372.
The square of the sum of the two number: (x+y)^2 = x^2+2xy+y^2 = x^2 +y^2 - 2xy + 4 xy = 49 +4*137 = 49+548 = 597.