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Ilia_Sergeevich [38]
3 years ago
13

Can someone help me, please and thank you? I'll give BRAINLEST to the person who gets it right!!!

Mathematics
2 answers:
Elis [28]3 years ago
6 0

Answer:

x=-4

Step-by-step explanation:

8=2x+16

Switch Sides

2x+16=8

Subtract 16 from both sides

2x+16-16=8-16

Simplify

2x=-8

Divide both sides by 2

2x/2 = -8/2

x = - 4

dmitriy555 [2]3 years ago
5 0

Answer:

x = - 4

8 = 2x + 16

2x = - 8

x = - 4

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Suppose a lawn and garden company wants to determine the current percentage of customers who use fertilizer on their lawns. How
marishachu [46]

Answer:

n=601

Step-by-step explanation:

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}})

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 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

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

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

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 0.04 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)  

Since we don't have a prior estimation for the proportion we can use 0.5 as estimation. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.96})^2}=600.25  

And rounded up we have that n=601

3 0
3 years ago
Compare the following fraction <br>4/3 and 5/2<br>-3/2. -4/5​
zavuch27 [327]

Answer:

Step-by-step explanation:

to compare them, we need to convert them into like fractions

4/3 and 5/2

lcm of 3 and 2 is 6

4/3 × 2/2 = 8/6

5/2 × 3/3 = 15/6

15/6 is greater than 8/6

<em><u>so 5/2 is greater than 4/3</u></em>

similarly,

-3/2 and -4/5

we need to convert them into like fractions

lcm of 2 and 5 is 10

-3/2 × 5/5 = -15/10

-4/5 × 2/2 = -8/10

-8/10 is greater than -15/10

<u><em>so -4/5 is greater than -3/2</em></u>

Hope this helps

plz mark as brainliest!!!!

5 0
3 years ago
If a sprinkler waters 1 over 12 of a lawn in 1 over 4 hour, how much time will it take to water the entire lawn?
Pachacha [2.7K]
It should take like 3 hours so D.

7 0
3 years ago
Read 2 more answers
Please help right away
Y_Kistochka [10]

Answer:

I think it is B

Step-by-step explanation:

8 0
3 years ago
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