What is the length of the blue segment in OL below?

Mathematics

2 answers:

svp [43]3 years ago

5 0

The answer is A, 7.74

Anettt [7]3 years ago

5 0

Answer:

c 3.95 that's what I think

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The key factors in determining the accuracy of an opinion poll are

MAVERICK [17]

Answer:

Option B

Step-by-step explanation:

In this case, rather than tell you why option B is correct, let me tell you why the other options are incorrect.

As you can see, all the options share one common answer and is the sample size, so, this is one of the first key factors.

In option A, you have same percentage of men and women. This is not true, because the poll can be used only by men or women, so the percentage of men and women are not factors here.

In option C, we only have the population size. This is not accurate because, because we can determine the accuracy of the poll whether you have a population size of 20 people, and get the same accuracy with a population size of 100.

In option D, it's not neccesary the timeline, because you can take the accuracy in one time, and the result will be the same after time, for example, suppose the opinion poll is about politic, and the question is whether you liked Trump at the beggining or not. You could answer no at first, and say no again, 5 years later if the question remains the same.

Finally option E, you don't need to know the nature of the sampling process to get the accuracy of the poll.

The most important here is which method was taken to do the poll, for example, if it was oral, written or other method.

6 0

4 years ago

X=3 and y=5 can someone help me understand this plz

geniusboy [140]

4*5-3=17
The answer is 17

4 0

4 years ago

What is the length, in feet, of the rope?

Rashid [163]

total length = total perimeter of dance floor

20 x 2 + 30 x 2 =

40 + 60 =

100 feet

Answer is D. 100

please mark brainliest

6 0

3 years ago

I need help with this for my numerical analysis class! Consider the following data set: (1,2.2), (3,5), (5,5.5),(7,6.1), (10,6.6

lyudmila [28]

Answer:

m ≈ 8.165
b ≈ 2.299

Step-by-step explanation:

It is convenient to let technology help out. Some graphing calculators will accommodate a model of your choice. Others are restricted to particular models, of which yours may not be one.

A spreadsheet solver may also offer the ability to optimize two variables at once. For that, you would write a function that gives the sum of the squares of the differences between your data points and those predicted by the model. You would ask the solver to minimize that sum.

If you want to do this "the old-fashioned way," you would write the same "sum of squares" function and differentiate it with respect to m and b. Solve the simultaneous equations that make those derivatives zero. (My solver finds multiple solutions, so the neighborhood needs to be restricted in some way. For example m > 0, b > 0, or sum of squares < 1.)