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Aloiza [94]
3 years ago
13

PLEASE HELP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Mathematics
2 answers:
seropon [69]3 years ago
6 0

Answer:

add 6 to both sides then divide both sides by 5

Step-by-step explanation:

timama [110]3 years ago
3 0

Answer:

add 6 to both sides and dividing both sides by 5.

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Please help, i’ll give brainliest!
Rama09 [41]

Answer: There is no correlation.

Step-by-step explanation:

4 0
3 years ago
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A university found that 20% of its students withdraw without completing the introductory statistics course. Assume that 20 stude
bulgar [2K]

Answer:

a) 20.61%

b) 21.82%

c) 42.36%

d) 4 withdrawals

Step-by-step explanation:

This situation can be modeled with a binomial distribution, where p = probability of “success” (completing the course) equals 80%  = 0.8 and the probability of “failure” (withdrawing) equals 0.2.

So, the probability of exactly k withdrawals in 20 cases is given by

\large P(20;k)=\binom{20}{k}(0.2)^k(0.8)^{20-k}

a)

We are looking for

P(0;20)+P(0;1)+P(0;2) =  

\large \binom{20}{0}(0.2)^0(0.8)^{20}+\binom{20}{1}(0.2)^1(0.8)^{19}+\binom{20}{2}(0.2)^2(0.8)^{18}=

0.0115292150460685 + 0.0576460752303424 + 0.136909428672063 = 0.206084718948474≅ 0.2061 or 20.61%

b)

Here we want P(20;4)

\large P(20;4)=\binom{20}{4}(0.2)^4(0.8)^{16}=0.218199402\approx 0.2182=21.82\%

c)

Here we need

\large \sum_{k=4}^{20}P(20;k)=1-\sum_{k=1}^{3}P(20;k)

But we already have P(0;20)+P(0;1)+P(0;2) =0.2061 and

\large \sum_{k=1}^{3}P(20;k)=0.2061+P(20;3)=0.2061+0.205364 \approx 0.4236=42.36\%

d)

For a binomial distribution the <em>expectance </em>of “succeses” in n trials is np where p is the probability of “succes”, and the expectance of “failures” is nq, so the expectance for withdrawals in 20 students is 20*0.2 = <em>4 withdrawals.</em>

3 0
3 years ago
Sugar Shack Cookies had 5 types of cookies in its display case. The number of each cookie sold during day one is recorded. Find
Troyanec [42]

Answer: 40%

Step-by-step explanation:

Chocolate chip and oatmeal cookies: 9+35 = 44

Total cookies = 9+21+15+35+30 = 110

What percent is 44 of 110 (%/100 = is/of)

x/100 = 44/110 (cross multiplication)

4400/110 = 40

6 0
3 years ago
I’m confused on this one
otez555 [7]

Well a circle has 360 degrees and this question wants the degree of counter-clockwise.

I think first we subtract 69 from 360, since that is the rotation clockwise, to get the angle of rotation.

360 - 69 is 291 degrees

7 0
3 years ago
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Sarah have 40 nickels in her bank her dad gave her 44 more nickels how many nickels does Sarah have now ​
Evgen [1.6K]

Answer:

She now has 84 nickles. :)

Step-by-step explanation:

40+44=84

3 0
3 years ago
Read 2 more answers
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