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ra1l [238]
2 years ago
8

Help me pleasee

Mathematics
1 answer:
Verizon [17]2 years ago
5 0

A. Less that 90 degrees

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2xy + 5 - 8 +3xy -y +7 + 3 y= ___ xy -8 ____ + ___ y +___ <br> I don't understand help please :*
cestrela7 [59]
2xy + 5 - 8 + 3xy - y +7 + 3y = 5xy - 8 + 2y + 12
6 0
3 years ago
22. Determine the number of month in 0.25 years
REY [17]

Answer:

3 months

Step-by-step explanation:

there are 12 months in a year.

.25 is equal to a quarter of a year

12/4=3

4 0
2 years ago
Read 2 more answers
A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a ne
Leto [7]

Answer:

The 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative is (0.6247, 0.6923).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

Of the 533 randomly selected Americans surveyed, 351 were in favor of the initiative.

This means that n = 533, \pi = \frac{351}{533} = 0.6585

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6585 - 1.645\sqrt{\frac{0.6585*0.3415}{533}} = 0.6247

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6585 + 1.645\sqrt{\frac{0.6585*0.3415}{533}} = 0.6923

The 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative is (0.6247, 0.6923).

6 0
3 years ago
i will give u brainlyist plz When 1/3 is written as a repeating decimal, which digits are repeating? A. 27 B. 37 C. 73 D. 28
gogolik [260]

Answer:

1/3 in decimal format is .333333333333... so none of these are correct

7 0
3 years ago
A fan is marked up 40% off the original lrice the original price was $20 whar is tge new price of the fan before sales tax
Neporo4naja [7]
10% of 20 is 2
2x4=8
20-8=12
The answer is $12
7 0
3 years ago
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