All categories

3 years ago

Help me please!!!!!!!!!!!

Mathematics

2 answers:

ch4aika [34]3 years ago

7 0

The type of transformation is scaling. the fourt types r translation, rotation, reflection, and scaling. this one get bigger so its scaling

BARSIC [14]3 years ago

6 0

The answer is dilation

You might be interested in

If x° and 54° form a linear pair find x°

elixir [45]

Answer:

x = 126°

Step-by-step explanation:

x + 54 = 180°

x + 54 - 54 = 180 - 54

x = 126°

6 0

3 years ago

Read 2 more answers

Tammy wrote ordered pairs (x, y) using the pattern below.

REY [17]

Answer:

A:(15,18)

Step-by-step explanation:

Hopefully this helps!

7 0

3 years ago

Jeff find some bugs he finds 10 fewer grasshoppers than crickets he find 5 fewer crickets then lady bugs if Jeff finds 5 grassho

topjm [15]

20 ladybugs
15 cricket

8 0

3 years ago

In a college student poll, it is of interest to estimate the proportion p of students in favor of changing from a quarter-system

Contact [7]

Answer:

n=206

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

Solution to the problem

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 99% of confidence, our significance level would be given by $\alpha=1-0.99=0.01$ and $\alpha/2 =0.005$ . And the critical value would be given by:

$t_{\alpha/2}=-2.58, t_{1-\alpha/2}=2.58$

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)

And on this case we have that $ME =\pm 0.09$ , we can use as prior estimate of p 0.5, since we don't have any other info provided, and we are interested in order to find the value of n, if we solve n from equation (a) we got: