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1 year ago

WHATS THIS ANGEL PLEASE PLEASE PLEASE

Mathematics

1 answer:

IrinaK [193]1 year ago

6 0

Answer:

The answer is 68 degree

Step-by-step explanation:

here you go angel....

please mark brainliest

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92 points pls 3(5−6)−2(4+5)

xeze [42]

Answer:

= −21

Step-by-step explanation:

3(5−6)−2(4+5)

=(3)(−1)−2(4+5)

=−3−2(4+5)

=−3−(2)(9)

=−3−18

=−21

brainliest please? :)

8 0

3 years ago

1) Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store.

densk [106]

Answer:

E) .0863

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

For this case we can find the sample proportion for each observation with the following formula:

$\hat p = \frac{X}{n}$

Where X represent the number of returns and n =100 for each case since the standard value used. Using the last formula we got:

$p_1 = \frac{10}{100}=0.1$

$p_2 = \frac{9}{100}=0.09$

$p_3 = \frac{11}{100}=0.11$

$p_4 = \frac{7}{100}=0.07$

$p_5 = \frac{3}{100}=0.03$

$p_6 = \frac{12}{100}=0.12$

$p_7 = \frac{8}{100}=0.08$

$p_8 = \frac{4}{100}=0.04$

$p_9 = \frac{6}{100}=0.06$

$p_{10} = \frac{11}{100}=0.11$

And now witht those values we can find the sample mean of proportions with the following formula:

$hat p = \frac{\sum_{i=1}^n p_i}{n}= \frac{0.1+0.09+0.11+0.07+0.03+0.12+0.08+0.04+0.06+0.11}{10}=0.081$

And we can find the standard error with the following formula:

$SE= \sqrt{\frac{\hat p (1-\hat p)}{n}}=\sqrt{\frac{0.081(1-0.081)}{10}}=0.0863$

So then the best option on this case is given by:

E) .0863

6 0

3 years ago

An entry level price for Car A is R220 000, while an entry level price for Car B is approximately 81.818% of Car A. Explore Moto

REY [17]

<em><u>Explore Motors dealership has R7 million to spend and wants to buy equal numbers of the entry.</u></em>

6 0

3 years ago

In △ABC, AB = 13, AC = 20, BC = 21. Find the length of the altitude AD

nika2105 [10]

The length of the altitude AD is 12 units.

<h3>How to find the height of a triangle?</h3>

The height of the triangle can be found as follows:

We have to find an angle using cosine law before we can find the height.

Therefore,

20² = 13² + 21² - 2 × 21 × 13 cos B

400 = 169 + 441 - 546 cos B

400 - 610 = - 546 cos B

-210 = - 546 cos B

cos B = -210 / -546

cos B = 0.38461538461

B = cos⁻¹ 0.38461538461

B = 67.3810899783

B = 67.38°

Hence,

sin 67.38° = opposite / hypotenuse

sin 67.38° = AD / 13

cross multiply

AD = 13 sin 67.38°

AD = 11.9999882145

AD = 12 units

learn more on triangle here: brainly.com/question/13387814

#SPJ1

6 0

2 years ago

What is this !?help please!

vfiekz [6]

Triangle A: Right
Triangle B: I think it’s Obtuse

Sorry if it’s wrong

6 0

3 years ago

Read 2 more answers