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NeTakaya
2 years ago
9

(please help last question) which of the following statements are true (brainliest)

Mathematics
1 answer:
puteri [66]2 years ago
7 0

Answer:

Both have a negative slope.

Step-by-step explanation:

Because:

The equation has a negative slope (-2).

The table has a negative slope (-0.5):

(0,3). (2,2)

(X1, y1). (X2, y2)

M = y2-y1

_____

X2- x1

M = 2 - 3 -1

_____ = ___

2-0 2

Hope this helps! Have a great day!

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Viefleur [7K]

Answer:

The answer is -7.15, hope this helps.

8 0
2 years ago
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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
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schepotkina [342]
The answer is 7√10−√6

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3 years ago
Solve for x using the quadratic formula x^2-6x +9=0
Rufina [12.5K]

Answer:

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EXPLANATION:

plug in inputs and do a little simplifying we get

x = 6 ± √(36-36) all of that over 2

So we simplify and we get 6±sqrt(0) / 2

Then we get 6/2 = 3

x-0 = x+0

thats why there is only one answer

4 0
3 years ago
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Can you tell me the answer? E = ?
Travka [436]

Answer:

E=mc^{2}

Step-by-step explanation:

An Albert Einstein iconic math problem.

3 0
3 years ago
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