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2 years ago

Can someone please answer this please and explain

Mathematics

2 answers:

iogann1982 [59]2 years ago

8 0

Plug in the number in the x column as X and your answer will equal Y which is the number you will put in the chart.

Blababa [14]2 years ago

4 0

Answer:

12 3 0 3 12

Step-by-step explanation:

Just plug in each value in the table in as x so when you plug in -2 that would be 3(-2)^2. -2x-2=4. 4x3=12. :)

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The Wall Street Journal reported that automobile crashes cost the United States $162 billion annually (2008 data). The average c

ivanzaharov [21]

Answer:

$n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94$

So the answer for this case would be n=94 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma= 500$ represent the population standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{s}{\sqrt{n}}$ (a)

And on this case we have that ME =120 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The confidence2 level is 98% or 0.98 then the significance level would be $\alpha=1-0.98=0.02$ and $\alpha/2=0.01$ , the critical value for this case would be $z_{\alpha/2}=2.326$ , replacing into formula (b) we got:

$n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94$

So the answer for this case would be n=94 rounded up to the nearest integer

8 0

2 years ago

Which is greater 5/6 or 2/3

geniusboy [140]

5/6 because 5/6=0.80 and 2/3=0.66

6 0

2 years ago

Read 2 more answers

What is the mean of the following set of data? Round your answer to two decimal places.

kolezko [41]

The mean is 73.44

You could've found this by adding up all the values in the data set, then dividing by how many numbers were in the data set!

66+81+60+72+79+83+60+92+68 = 661

661 ÷ 9 = 73.44

7 0

2 years ago

What is the slope of the line on the graph?

Phoenix [80]

Answer:

$m=-2$