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3 years ago

4. Identify the graph of the solution set of 9 > 3 + 2x.

Mathematics

1 answer:

Ray Of Light [21]3 years ago

7 0

Answer:

Step-by-step explanation:

9 > 3 + 2x

6 > 2x

3 > x

x < 3

and that means 3 is NOT included (otherwise there must be a smaller or equal sign). hence A is the right answer.

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The length of one leg or a right triangle is 4 meter, and the length of the hypotenuse is 15 meters. What is the length of the o

JulsSmile [24]

Using the Pythagorean theorem a^2 +b^2 = C^2

a and b are sides and C is the hypotenuse.

4^2 + b^2 = 15^2

16 + b^2 = 225

Subtract 16 from each side:

b^2 = 209

b = SQRT(209)

As a decimal it would be 14.45

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3 years ago

Which decim is greater than 2.234

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The Decimal greater then that is 2.35

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3 years ago

What is the answer to 2(4+9w)-4

DerKrebs [107]

Answer:

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Step-by-step explanation:

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3 years ago

You are studying the water properties of a bog in eastern Wisconsin and wish to estimate its acidity. You de ne a grid that cove

GenaCL600 [577]

Answer:

$4.8-1.453\frac{1.3}{\sqrt{82}}=4.591$

$4.8+1.453\frac{1.3}{\sqrt{82}}=5.009$

So on this case the 85% confidence interval would be given by (4.591;5.009)

And we can conclude that the true mean for the acidity at 85% of confidence is between (4.591;5.009)

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".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=82-1=81$

Since the Confidence is 0.85 or 85%, the value of $\alpha=0.15$ and $\alpha/2 =0.075$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.075,81)".And we see that $t_{\alpha/2}=1.453$

Now we have everything in order to replace into formula (1):

$4.8-1.453\frac{1.3}{\sqrt{82}}=4.591$

$4.8+1.453\frac{1.3}{\sqrt{82}}=5.009$

So on this case the 85% confidence interval would be given by (4.591;5.009)

And we can conclude that the true mean for the acidity at 85% of confidence is between (4.591;5.009)

6 0

4 years ago

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Dahasolnce [82]

Answer:

Step-by-step explanation:

If you multiply the price for each mule x the amount of miles + the daily rental, you get the price. If you do this for each option and each car rental then you can see when the answers add up.

.75x56+20=62

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4 years ago

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