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vladimir2022 [97]
3 years ago
9

Algebra:y+7-2=21so confused, can someone help?​

Mathematics
2 answers:
aleksandrvk [35]3 years ago
8 0

Answer:

y+7-2=21

y+5=21

y+21-5

y=16

Step-by-step explanation:

k0ka [10]3 years ago
5 0

Answer:

Step-by-step explanation:

y+7-2=21

y + 5 = 21

y = 21 - 5

y = 16

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In a random sample of 8 ​people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.2 minutes. A 95
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Answer: Margin of error = 6.58

Confidence interval =  (26.91, 40.08)

Step-by-step explanation:

Since we have given that

Sample size n = 8

Sample mean = 33.5 minutes

Population standard deviation = 9.5 minutes

At 95% confidence interval,

α = 0.05

t = 1.96

So, Margin of error is given by

t\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{9.5}{\sqrt{8}}\\\\=6.58

Confidence interval would be

Lower limit:

\bar{x}-6.58\\\\=33.5-6.58\\\\=26.91

Upper limit:

\bar{x}+6.58\\\\=33.5+6.58\\\\=40.08

Hence, the interval would be (26.91, 40.08)

But at standard deviation 7.2 minutes, the confidence interval was (27.5, 39.5)

Confidence interval using the standard normal distribution is wider than the confidence interval using t distribution.

3 0
3 years ago
Round 16.05792 to the nearest tenth
Alex
The answer would be 16.1
8 0
3 years ago
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At Elisa's printing company llc there are two kinds of printing presses: model a which can print 70 books per day and model b wh
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70a + 55b = 905
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At a shelter, 15% of the dogs are puppies their are 60 dogs
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9 puppies

Step-by-step explanation:

15% = 9 puppies

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Step-by-step explanation:

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