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evablogger [386]
3 years ago
12

I don't understand pls help

Mathematics
1 answer:
MrMuchimi3 years ago
3 0
Twilight was liked by half the class because if you add up the number of students you get 24 and half of 24 is 12
(Hope this helped)
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The first column contains five pairs of relationships. Determine if each pair forms
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1. Proportional
2. Not Proportional
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4. Proportional
5. Proportional
8 0
3 years ago
What expression is equivalent to 30 divided (3 + x)
kicyunya [14]

Answer:

the second one

Step-by-step explanation:

30/ (3+x)

6 0
3 years ago
A 2003 survey showed that 14 out of 250 Americans surveyed had suffered some kind of identity theft in the past 12 months. What
ivann1987 [24]

Answer:

The lower confidence limit of the 95% confidence interval for the population proportion of Americans who were victims of identity theft is 0.0275.

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}.

A 2003 survey showed that 14 out of 250 Americans surveyed had suffered some kind of identity theft in the past 12 months.

This means that n = 250, \pi = \frac{14}{250} = 0.056

95% confidence level

So \alpha = 0.05, z is the value of Z that has a p-value of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.056 - 1.96\sqrt{\frac{0.056*0.944}{250}} = 0.0275

The lower confidence limit of the 95% confidence interval for the population proportion of Americans who were victims of identity theft is 0.0275.

5 0
2 years ago
Which math expression???? 7th grade
DiKsa [7]
I think it's A because of PEMDAS so you multiply 8 by n-3
8 0
3 years ago
Read 2 more answers
10. 5(3-9b) = 3(-15b – 2)
olga2289 [7]

Answer:

No Solution

Explanation:

5(3 - 9b) = 3(-15b – 2)

Expand

5(3 - 9b): 15 - 45b

3(-15b - 2): -45b - 6

15 - 45b = -45b - 6

Subtract 5 From Both Sides

15 - 45b - 15 = -45b - 6 - 15

Simplify

-45b = -45b - 21

Add 15b To Both Sides

-45b + 15b = -45b - 21 + 15b

Simplify

0 = -21

No Solution

8 0
3 years ago
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