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2 years ago

(17) geometry help pls

Mathematics

1 answer:

Semenov [28]2 years ago

8 0

Notice how the y coordinates of points Z and X are both b. It doesn't matter what the x coordinates are. Because both y coordinates are b, this means we have a horizontal line of slope 0.

For points Y and W, the x coordinate is both 'a'. The y coordinate doesn't matter. Since the x coordinate here is both 'a', we have a vertical line with an undefined slope.

ZX is a completely horizontal line
YW is a completely vertical line
Therefore, the diagonals are perpendicular

Note: we can't use the negative reciprocal idea since there is no reciprocal of 0

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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.

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So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

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2 years ago