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3 years ago

Someone please help me quick, I don't know the answer to this question

Mathematics

2 answers:

Juli2301 [7.4K]3 years ago

8 0

Answer:

It is 4 and it is so easy to add i needed free points thank you so much have a great day

Step-by-step explanation:

Aloiza [94]3 years ago

3 0

Four. If you have two gummy bears and you add the same amount, you would have four. Take these two question marks for example:

? ?

There is two. If you added two (the same amount) again, you would have:

? ?

Four question marks.

This shows that 2+2=4

( I hope you’re joking but just in case)

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Suppose that a jewelry store tracked the amount of emeralds they sold each week to more accurately estimate how many emeralds to

RUDIKE [14]

Answer:

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

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

And for this case the 95% confidence interval is given by (2.13; 2.37)

We have a point of estimate for the sample mean with this formula:

$\bar X = \frac{Upper+ Lower}{2}= \frac{3.37+2.13}{2}= 2.75$

And for the margin of error we have the following estimation:

$ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62$

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

$\mu$ 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)

And for this case the 95% confidence interval is given by (2.13; 2.37)

We have a point of estimate for the sample mean with this formula:

$\bar X = \frac{Upper+ Lower}{2}= \frac{3.37+2.13}{2}= 2.75$

And for the margin of error we have the following estimation:

$ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62$

5 0

2 years ago

Madison buys supplies so she can make and sell wind chimes. She begins

Studentka2010 [4]

<h3>Explanation:</h3>

In the graph x-coordinate represents the number of wind chimes sold and y-coordinate represents the profit Madison earned. If a point is below the x-axis, means it has negative y-coordinate than it represents loss. Points above x-axis should have x-coordinate more than 6 as stated in the question that she started earning profit after selling her first 6 wind chimes. All the points having x-coordinate less than 6 should lie on or below the x-axis.

By the above statement point B is completely wrong. Point C and Point A are also wrong as they both x-coordinate more than 6 but still they are below x-axis.

Point D is the makes most sense here as it has x-coordinate more than 6 and it is above x-axis. This means that when Madison sold 7 wind chimes she was in a profit of $3.75.

5 0

2 years ago

Read 2 more answers

Simplify 15 to the 18th power over 15 to the 3rd power.

worty [1.4K]

The rule for quotients of similar bases with different exponents is:

(a^c)/(a^b)=a^(c-b) in this case:

15^18/(15^3)=15^15

3 0

2 years ago

Hi Mariceo, when you submit this form, the owner will be able to see your name and email address.

Andreyy89

So you can see my email address? Haha sure...

6 0

2 years ago

Determine if the following system of equations has no solutions, infinitely many

Lesechka [4]

Step-by-step explanation:

5x+6=1

5x=1-6

5x=-5

x=-1 in -5x-8y=2

-5(-1)-8y=2

5-8y=2

-8y =2-5

-8y=-3

7 0

3 years ago