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vodka [1.7K]
3 years ago
10

PLEASE HELP!!!!!!!

Mathematics
2 answers:
Wewaii [24]3 years ago
5 0
Angles I and L are congruent!
Galina-37 [17]3 years ago
4 0

Answer:

The third option is correct

Step-by-step explanation:

Similar triangles have congruent angles and these are  labelled in the order of congruence in the name of the triangle. For example if  ABC and XYZ are similar then m<A ≅ m< X   and so on.

So for  triangles GHI and JKL  angles I and L are congruent

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A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the
Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

25% of all adults had used the Internet for such a purpose

This means that \pi = 0.25

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

What is the required sample size for the new study?

This is n for which M = 0.03. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}

0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}

\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}

(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2

n = 800.3

Rounding up:

The required sample size for the new study is 801.

4 0
2 years ago
What is £56 divided in a ratio of 3:5?
Luda [366]
First, add the ratio together to get the denominator of the fraction you will use to determine the share. 3+5= 8. Now, you have two fractions: 3/8 and 5/8. Next, just find 3/8 and 5/8 of 56 to get your answers:
(56÷8)×3= <span>£21
</span>and
(56÷8)×5= <span>£35</span>
7 0
3 years ago
700 divided by 12 <br> Please help me
kogti [31]
700/12 equals 58 and 1/3.
6 0
3 years ago
Read 2 more answers
Please help me out! the question is
kupik [55]
They had the same quotient because both of those equations are equal
5 0
3 years ago
What factors of -52 have the sum of -9
nevsk [136]

Answer:

Step-by-step explanation:

13 and 4 in some combination.

The larger number must be minus.

The answer is - 13 + 4 which leaves you with - 9

8 0
2 years ago
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