All categories

4 years ago

What is the answer to this problem and if so could you explain how u got the answer

Mathematics

1 answer:

viva [34]4 years ago

4 0

20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68,71,74,77,80
The correct answer will be A and B
The last three is wrong based on the numbers

You might be interested in

Plssss help meeeeeeee plssss

djyliett [7]

The correct answer is for the first image is B and the second image the answer will be D

6 0

3 years ago

The random variable x represents the number of computers that families have along with the corresponding probabilities. Find the

Elena L [17]

Answer:

The correct option is (d).

Step-by-step explanation:

The complete question is:

The random variable x represents the number of computers that families have along with the corresponding probabilities. Use the probability distribution table below to find the mean and standard deviation for the random variable x.

x : 0 1 2 3 4

p (x) : 0.49 0.05 0.32 0.07 0.07

(a) The mean is 1.39 The standard deviation is 0.80

(b) The mean is 1.39 The standard deviation is 0.64

(c)The mean is 1.18 The standard deviation is 0.64

(d) The mean is 1.18 The standard deviation is 1.30

Solution:

The formula to compute the mean is:

$\text{Mean}=\sum x\cdot p(x)$

Compute the mean as follows:

$\text{Mean}=\sum x\cdot p(x)$

$=(0\times 0.49)+(1\times 0.05)+(2\times 0.32)+(3\times 0.07)+(4\times 0.07)\\\\=0+0.05+0.64+0.21+0.28\\\\=1.18$

The mean of the random variable x is 1.18.

The formula to compute variance is:

$\text{Variance}=E(X^{2})-[E(X)]^{2}$

Compute the value of E (X²) as follows:

$E(X^{2})=\sum x^{2}\cdot p(x)$

$=(0^{2}\times 0.49)+(1^{2}\times 0.05)+(2^{2}\times 0.32)+(3^{2}\times 0.07)+(4^{2}\times 0.07)\\\\=0+0.05+1.28+0.63+1.12\\\\=3.08$

Compute the variance as follows:

$\text{Variance}=E(X^{2})-[E(X)]^{2}$

$=3.08-(1.18)^{2}\\\\=1.6876$

Then the standard deviation is:

$\text{Standard deviation}=\sqrt{\text{Variance}}$

$=\sqrt{1.6876}\\\\=1.2990766\\\\\approx 1.30$

Thus, the mean and standard deviation for the random variable x are 1.18 and 1.30 respectively.

The correct option is (d).

3 0

3 years ago

2. Wpisz taką liczbę, aby rozwiązaniem równania była liczba 2.

lys-0071 [83]

I didn’t understand but when I understand I will help you

5 0

3 years ago

Can someone help me this ? Finding an angle measure for a triangle with an extended side

Sedaia [141]

Answer:

x° =121°

Step-by-step explanation:

The inside angles of a triangle together must equal 180°. Therefore, 58° + 63° + n° = 180° if n equals the third angle inside the triangle. So,

180°-(58°+63°)=n°

180° - 121° = n°

59° = n°

Since the outside angle x and 59° must also equal 180°,

180° - 59° = x°

121° = x°

You can also find the exterior angle without finding the interior by adding the two other interior angles together.

58°+63°=x°

121°=x°

3 0

3 years ago

Read 2 more answers

Y is directly proportional to x and k is a constant. Which equation

inn [45]

It would be Y=kx.
Look at photo for explanation

7 0

3 years ago

Read 2 more answers