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2 years ago

5. Determine the length of the missing side, if possible. B 8 a A 3

Mathematics

2 answers:

Bingel [31]2 years ago

6 0

Answer:

i think that it will be c 9 b C 4

Step-by-step explanation:

Bas_tet [7]2 years ago

6 0

C 9 B C 4 will be your answer

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How many more hostel rooms have 4 to 7 guests than 20 to 23 guests?

Ksenya-84 [330]

Answer:

Step-by-step explanation:

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3 years ago

Is (8,-16) a function

koban [17]

Answer:

No, 8-16 is not a function

8-15a is a function

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2 years ago

True or False: On the Mertler’s vacation to Florida, they drove 180 miles in 3 hours before stopping for lunch. After lunch they

natita [175]

Answer:

true

Step-by-step explanation:

because the ratios are both 60 miles in 1 hour

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2 years ago

Suppose that scores on the mathematics part of a test for eighth-grade students follow a Normal distribution with standard devia

riadik2000 [5.3K]

Answer:

We need an SRS of scores of at least 153.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How large an SRS of scores must you choose?

This is at least n, in which n is found when $M = 20, \sigma = 150$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$20 = 1.645*\frac{150}{\sqrt{n}}$

$20\sqrt{n} = 1.645*150$

$\sqrt{n} = \frac{1.645*150}{20}$

$\sqrt{n} = 12.3375$

$(\sqrt{n})^{2} = (12.3375)^{2}$

$n = 152.2$

Rounding to the next whole number, 153

We need an SRS of scores of at least 153.

8 0

2 years ago

e Ann, Claire, and Josh collect stickers. One week, Ann collects 7 more stickers than Josh. Josh collects twice as many stickers

lisabon 2012 [21]

Answer: Ann = 67 Josh = 60 Claire = 30

Step-by-step explanation: You get the equation 5x+7 = 157. You get the equation because for example, Claire = x then josh = 2x and Ann = 2x + 7. You do all the math and boom! You get the answer :)

4 0

3 years ago