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maria [59]
2 years ago
14

- 15 + 21c = - 9 need help asap

Mathematics
2 answers:
Aliun [14]2 years ago
5 0

Answer:

c is 2over 7

Step-by-step explanation:

if yk wat i mwan i mean in fractions like 2 on top and 7 at the bottom

Ne4ueva [31]2 years ago
5 0

Answer:

2/7

Step-by-step explanation:

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In preparation for an earnings report, a large retailer wants to estimate p= the proportion of annual sales
mr Goodwill [35]

Using the z-distribution, it is found that the 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

The sample size and the estimate are given by:

n = 161, \pi = \frac{37}{161} = 0.2298

Hence:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 - 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.1648

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 + 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.2948

The 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

More can be learned about the z-distribution at brainly.com/question/25890103

5 0
2 years ago
What is the slope of line p?
Digiron [165]

Answer:

2/3

Step-by-step explanation:

Slope is rise over run which is 2/3

3 0
2 years ago
Mustafa’s soccer team is planning a school dance as a fundraiser. The DJ charges $200 and decorations cost $100. The team decide
NemiM [27]

Answer:

360 students

Step-by-step explanation:

take the 1,500 dollars needed for profit and add the other variables (100+200),and the total would be 1,800. take that 1,800 and divide that by 5.

4 0
3 years ago
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I think is it Option 2
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3 years ago
Circumference of a circle is 14 pi what is the area in square inches express your answer in terms of pie
Alexxandr [17]

Answer: 49π inches²

Step-by-step explanation:

The formula for the circumference of a circle = 2πr

Since the circumference is 14π, we have to find the radius in order to solve the area.

2πr = 14π

r = 14π/2π

r = 7

Since area = πr²

= π × 7 × 7

= 49π inches²

5 0
2 years ago
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