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3 years ago

I got the y intercept right which is 0,3 but can’t find the slope step by step

Mathematics

1 answer:

deff fn [24]3 years ago

4 0

Answer:

You can find the slope by calculating the rise over run

Step-by-step explanation:

The rise of every 4 spaces is 1 so it is 1/4

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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

What is expression equivalent to 33

Tatiana [17]

The correct answer is D

2^5 is equal to 32, and you add one to make 33

To find 2^5, think of it this way:
2*2*2*2*2
This becomes 4*4*2 or 32

Hop this helps

5 0

3 years ago

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The population of Finland was 5 503 000 in 2017.

Luden [163]

Answer:

i. 5 502 999

ii. 5 502 001

im sorry i dont understand

Step-by-step explanation:

Have a good day :)

6 0

2 years ago

How does doubling the side length of a rectangle affect its area

baherus [9]

Doubling the side-lengths will multiply the area by four.

Proof:
Let the side-lengths of the rectangle by x and y. Clearly, the area will be x*y=xy. The new rectangle will have side-lengths 2x and 2y, and thus area 2x*2y=4xy. 4xy/xy=4 - hence, the new rectangle has four times the area of the old one.

7 0

3 years ago

ILL GIVE YOU BRAINLIST PLS ANSWER RN RLY RLY NEED THIS

Norma-Jean [14]

Answer:

1. 1/2

2. .5

3. 50%

Step-by-step explanation:

2 of the types of cards out of 4 is 2/4 which is half

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3 years ago

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