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3 years ago

Y = -2/3 + 490

Mathematics

1 answer:

kondor19780726 [428]3 years ago

3 0

Answer:

Step-by-step explanation:

You would start at the 490 spot on the y axis. After that you would use Rise over run. Down 2 units and right three. Continue to do this until you reach the end of the graph, then go the opposite; up 2, left 3.

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Define democracy?Write any four key elements of democracy. Easy answer required.

umka21 [38]

Democracy: a system of government by the whole population or eligible members of state, typically through elected representatives

elements:
- equality
- accountability
- rule of law
- transparency

6 0

3 years ago

Please help me out :)

arlik [135]

Answer:

$\frac{\sqrt{17} }{7}$

Step-by-step explanation:

Using the Pythagorean identity

sin²x + cos²x = 1, then

sinx = $\sqrt{1-cos^2x}$

Note that ( $\frac{4\sqrt{2} }{7}$ )² = $\frac{32}{49}$

sinΘ = $\sqrt{1-(32/49)}$

= $\sqrt{\frac{17}{49} }$ = $\frac{\sqrt{17} }{7}$

5 0

3 years ago

A flood a creek's water level changes by −4 7/10 feet in 2 hours. What is the average change in the creek's water level per hour

dezoksy [38]

Answer:

-2.35

Step-by-step explanation:

Divide -4.7/2 = -2.35

3 0

3 years ago

Find the value of x and y

kifflom [539]

The answer is option B.

If you substitute the numbers you get 40° and 110° as it's supposed to be.

~~

I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

6 0

3 years ago

Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A random sample

GuDViN [60]

Answer: $(628.48,\ 661.52)$

Step-by-step explanation:

Given : Sample size : $n=16$ , which is a small sample (, 30) so we use t-test.

Sample mean : $\overline{x}=645 \text{ hours}$

Standard deviation : $\sigma = 31 \text{ hours}$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=2.131$

The confidence interval for population mean is given by :-

$\overline{x}\pm t_{n-1,\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm(2.131)\dfrac{31}{\sqrt{16}}\\\\\approx645\pm16.52\\\\=(645-16.52,\ 645+16.52)\\\\=(628.48,\ 661.52)$

Hence, a 95% confidence interval for the population mean $\mu$ = $(628.48,\ 661.52)$

6 0

3 years ago