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3 years ago

Please help will mark BRAINLIEST attach pic of work pls

Mathematics

1 answer:

juin [17]3 years ago

5 0

Answer:

Step-by-step explanation:

Given:

E is the midpoint of segment AC.

AE ≅ EC

∠BAE ≅ ∠ECD

To prove:

ΔAEB ≅ ΔCED

Statements Reasons

1). AE ≅ EC 1). Given

2). ∠BAE ≅ ∠ECD 2). Given

3). ∠AEB ≅ ∠CED 3). Vertically opposite angles theorem

4). ΔAEB ≅ ΔCED 4). By ASA postulate of congruence

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4/5 of 40

algol [13]

4/5 of 40 = 32
1/3 of 3 = 1
1/3 of 15 muffins = 10 muffins

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3 years ago

A chemist examines 12 sedimentary samples for bromide concentraction. The mean bromide concentration for the sample date is 0.43

Umnica [9.8K]

Answer:

a) $z = 1.645$

b) Lower endpoint: 0.422cc/m³

Upper endpoint: 0.452 cc/m³

Step-by-step explanation:

Population is approximately normal, so we can find the normal confidence interval.

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$ . This is the critical value, the answer for a).

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.645*\frac{0.0325}{\sqrt{12}} = 0.015$

The lower end of the interval is the sample mean subtracted by M. So it is 0.437 - 0.015 = 0.422cc/m³.

The upper end of the interval is the sample mean added to M. So it is 0.437 + 0.015 = 0.452 cc/m³.

Lower endpoint: 0.422cc/m³

Upper endpoint: 0.452 cc/m³

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3 years ago

Kirsten calculated the mean of 10 quiz scores. Later she was told there was an error in grading one of her quizzes. A quiz score

inessss [21]

The mean will be 5 points higher...so...c would be the answer!

3 0

3 years ago

Read 2 more answers

What is the equation of a line passing through 1,2 and -2,5

AleksAgata [21]

Answer:

y=-1x+3

Step-by-step explanation:

2-5/1+2

-3/3

-1

y=-1x+b

2=-1+b

b=3

y=-1x+3

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3 years ago

(02.01MC)The Department of Health in the Germany wants to know whether the national healthcare system is achieving its goals in

solniwko [45]

It should be noted that a population means the entire group that a researcher wants to draw conclusions about.

<h3>What is a population?</h3>

Your information is incomplete s the data is not provided. Therefore, an overview will be given.

In statistics, a population refers to a set of similar items which is of interest for an experiment.

On the other hand, a sample is a set of individuals or objects that are selected from a statistical population through a defined procedure.

In this case, it is important to deduce if the sample represents the population.

Learn more about population on:

brainly.com/question/25896797

6 0

2 years ago

Please help will mark BRAINLIEST *attach pic of work pls*

Please help will mark BRAINLIEST attach pic of work pls