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kupik [55]
3 years ago
6

the phoenix store sells two diferent packages of colored pencils. Package a contains 6 pencils and cost $3.48. brand b contains

11 pencils, and cost $6.49. what is the difference in cost, in dollars,per pencil between the two brands which is the better buy brainly
Mathematics
1 answer:
ASHA 777 [7]3 years ago
3 0

Answer:

Difference in dollars: $3.01

Step-by-step explanation:

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In a large population, 82% of the households have cable tv. A simple random sample of 225 households is to be contacted and the
anzhelika [568]

Answer:

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For proportions, the mean is \mu = p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

In this problem, we have that:

p = 0.82, n = 225.

So

\mu = 0.82

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.82*0.18}{225}} = 0.0256

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

7 0
3 years ago
Read 2 more answers
What is the solution set of x2 + 5x - 5 = 0?
Llana [10]

If you're completing the square the answer is in the image.

expression

x^2 + 5x - 5=ax^2+bx+c

a=1, b=5, c=-5, and you can solve it that way.

4 0
4 years ago
Find the slope and the y-intercept of the graph of y=6x – 5.
dolphi86 [110]

Answer:

y intercept is -5 and slope is 6/1

Step-by-step explanation:

3 0
3 years ago
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Find AC.<br> Round to the nearest tenth.<br> B<br> 86°<br> 16<br> С<br> 11<br> A
Vadim26 [7]

Answer:

19.4

Step-by-step explanation:

16^2+11^2=377

then square 377 which will equal to

19.416 which can be rounded up to 19.4

6 0
3 years ago
2-10n more math homework :|
creativ13 [48]

Step-by-step explanation:

Yea we need more information.

4 0
3 years ago
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