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3 years ago

Find the slope from the two points given: (2, 1) and (3,-10)

Mathematics

1 answer:

Lana71 [14]3 years ago

6 0

Answer:

-11

Step-by-step explanation:

let (2,1)be x1 and y1 respectively

(3,-10) be x2 and y2 respectively

From,slope= (y2-y1)/(x2-x1)

=(-10-1)/(3-2)

= -11/1

= -11

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Of the population of all fruit flies we wish to give a 90% confidence interval for the fraction which possess a gene which gives

maks197457 [2]

Answer:

The margin of error for the 90% confidence interval is of 0.038.

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 zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

To this end we have obtained a random sample of 400 fruit flies. We find that 280 of the flies in the sample possess the gene.

This means that $n = 400, \pi = \frac{280}{400} = 0.7$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

Give the margin of error for the 90% confidence interval.

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

$M = 1.645\sqrt{\frac{0.7*0.3}{400}}$

$M = 0.038$

The margin of error for the 90% confidence interval is of 0.038.

8 0

3 years ago

A video has a scale factor of 16:9. the short side is 5 cm how long is the long side. show your work to be the brainleest.

Fittoniya [83]

Answer:

8.89cm

Step-by-step explanation:

The ratio is 16:9 (which is one of the most common in TVs)

9:5=16:x

x=(16*5)/9

x=8.88....=8.89

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3 years ago

Please find the square root of 64.

Alexeev081 [22]

You have r^2 = 64 and want to find the square root of 64, which we'll call r.

√(r^2) = r = plus or minus √64

or: r = plus or minus 8

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3 years ago

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3 years ago

Find all pairs of natural numbers which can be the solution to the equation:<br> xy = 18

Scrat [10]

(1,18), (18,1), (2,9), (9,2), (3,6), and (6,3)

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3 years ago