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2 years ago

Given the graph of the pre-image and image, identify the correct coordinate transformation.

Mathematics

1 answer:

ziro4ka [17]2 years ago

8 0

The preimage was shifted to the image by a translation 2 units right and 2 units up, so the answer is $(x,y) \longrightarrow (x+2, y+2)$

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You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim

pogonyaev

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36$

And rounded up we have that n=656

Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by $\alpha=1-0.80=0.20$ and $\alpha/2 =0.10$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.28$

Solution to the problem

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

Since we don't have prior info for the proportion of interest we can use $\hat p=0.5$ as estimator. And on this case we have that $ME =\pm 0.025$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

And replacing into equation (b) the values from part a we got:

$n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36$

And rounded up we have that n=656

5 0

3 years ago

2x^2 -7= 74 please show all work

skad [1K]

$2x^2-7=74\\
2x^2=81\\
x^2=\dfrac{81}{2}\\
x=-\sqrt{\dfrac{81}{2}} \vee x=\sqrt{\dfrac{81}{2}}\\
x=-\dfrac{9}{\sqrt2} \vee x=\dfrac{9}{\sqrt2}}\\
x=-\dfrac{9\sqrt2}{2} \vee x=\dfrac{9\sqrt2}{2}}\\$

8 0

4 years ago

L 5.1.2 Exam: Semester Exam Two pizza delivery drivers compared the mean numbers of deliveries they completed in one day. Mean n

bixtya [17]

Answer:

This doesn't make sense

Step-by-step explanation:

6 0

3 years ago

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How much would<br> 20 copybooks cost?<br> €0.39

melomori [17]

Answer:

it would be 7.80 dollars or 7.8

Step-by-step explanation:

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3 years ago

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The Greek alphabet contains 24 letters. How many fraternity names with Greek letters can be formed if each fraternity name conta

ankoles [38]

For the first letter we have 24 choices. Since letters can't repeat the second letter has 23 choices (24 minus 1 that was used for the first slot) and the third has 22 (24 minus one for the first slot and one for the second slot).

The total number of combinations is thus: 24 x 23 x 22= 12,144

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3 years ago

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