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kramer
3 years ago
11

What is the best approximation of the solution to the system to the nearest integer values? ( 1 , -6 ) ( 2 , 7) ( -6 , 1 ) ( 0 ,

-7 )
Mathematics
2 answers:
hammer [34]3 years ago
7 0

Answer:

(0,7)

Step-by-step explanation:

aniked [119]3 years ago
4 0
-6, 1
..................
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You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the
Vesna [10]

Answer:

A sample size of at least 1,353,733 is required.

Step-by-step explanation:

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

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

In which

z is the zscore that has a pvalue of .

The margin of error is:

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

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

You would like to be 98% confident that you esimate is within 0.1% of the true population proportion. How large of a sample size is required?

We need a sample size of at least n.

n is found when M = 0.001.

Since we don't have an estimate for the proportion, we use the worst case scenario, that is \pi = 0.5

So

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

0.001 = 2.327\sqrt{\frac{0.5*0.5}{n}}

0.001\sqrt{n} = 2.327*0.5

\sqrt{n} = \frac{2.327*0.5}{0.001}

(\sqrt{n})^{2} = (\frac{2.327*0.5}{0.001})^{2}

n = 1353732.25

Rounding up

A sample size of at least 1,353,733 is required.

5 0
3 years ago
Tomatoes are on sale for 3 lb for$1.09 how much wil 5 lb of tomatoes cost
jarptica [38.1K]

<u>3lb/$1.09</u>

3       3

1lb/$0.363

1lb x 5/ $0.363 x 5

Answer - 5lb/$1.815

4 0
2 years ago
The sum of 2 numbers is 20 and their difference is 6. What are the two numbers
alexgriva [62]

Answer:

12 and 8

Step-by-step explanation:

bc i said

8 0
3 years ago
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A principal of $4200 is invested at 9% Interest, compounded annually. How much will the investment worth after 6 years? Use the
Harman [31]
Answer:7043.82

It would be 4200 x 1.09 which is the interest to the power of 6 for the number of years which would then give you 4200 x 1.09^6. This will then give the answer of 7043.82
3 0
3 years ago
3in = Feet I need to understand how to convert this to fractions
Vinil7 [7]
A foot is 12 in so a fraction could be 3/12
8 0
3 years ago
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