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2 years ago

I WILL GIVE YOU BRAINLIEST PLEASE HELPPPPP

Mathematics

1 answer:

Vanyuwa [196]2 years ago

3 0

Answer: 3/2

Step-by-step explanation:

Let's consider the points (6,9) and (4,6).

The difference in the y coordinates is 3, and the diffeence in the x coordinates is 2.

So, the slope is 3/2.

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Mrs. Martinez teaches Spanish part time at a nearby college. In one class, there are 12 women and 14 men; in her other class, th

AleksandrR [38]

Answer: Women =23. Men =31. All together equals =54

Step-by-step explanation:

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3 years ago

There are 18 students in Mr.Alvarez’s art class. Throughout the year, every student must pair up with every other student to com

earnstyle [38]

If there are 18 students every one of the will pair up with 17 other students throughout the year so the total amount of pairs that can be made is 18x17=306 but since it’s not important if student A is paired with student B or student B with student A we should divide the total amount of pairs by two- 306:2=153 so in total there will be 153 projects finished

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3 years ago

Is one of the factors of X to the power 15-64

victus00 [196]

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3 years ago

A market surveyor wishes to know how many energy drinks teenagers drink each week. They want to construct a 85% confidence inter

Gre4nikov [31]

Answer:

$7.3-1.440\frac{1.2}{\sqrt{830}}=7.240$

$7.3+1.440\frac{1.2}{\sqrt{830}}=7.360$

So on this case the 85% confidence interval would be given by (7.2;7.4)

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".

$\bar X=7.3$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma =1.2$ represent the population standard deviation

n=830 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)

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: "=-NORM.INV(0.075,0,1)".And we see that $z_{\alpha/2}=1.440$

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

$7.3-1.440\frac{1.2}{\sqrt{830}}=7.240$

$7.3+1.440\frac{1.2}{\sqrt{830}}=7.360$

So on this case the 85% confidence interval would be given by (7.2;7.4)

7 0

3 years ago

2.What is the most precise name for quadrilateral ABCD with vertices A(-2,4), B(5,6), C(12,4), and D(5,2)?

Brums [2.3K]

1) The answer is B, 2) the answer is D, method just put all points and get know the graph of each quadrilateral
3) the measure of one angle in a regular n-gon is given by the following main formula measure of interior angle= (n-2)*180°/n,
so for n=16, we have 14*180°/16=157.5°
4) the answer is A, because 360/5=72 > 40=360/9

7 0

3 years ago