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Ivan
3 years ago
15

To test the effectiveness of a new cold vaccine, a random sample of 50 people was selected. They were divided in two groups: one

consisted of 30 people who received the vaccine, and the other who did not receive the vaccine .What can we conclude about the effectiveness of this new cold vaccine (at a 5% level of significance) if in the first group 9 of the 30 who received the vaccine caught the cold, while in the other group 11 of the 20 people who did not receive the vaccine caught the cold.
Mathematics
1 answer:
Georgia [21]3 years ago
3 0

Step-by-step explanation:

Roll no irjdhrjejdjdjdndndnndbdnd dbdnsndnd

dnsnsnsjsnnzjznzjs

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Organize the following polynomial expressions from least to greatest based on their degree: x 2xyz 9x3y2 18x2 5ab − 6y 4x4 3x2 −
Advocard [28]

The order will be IV, III, I, and II.

<h2>Polynomial</h2>

Polynomial is an algebraic expression that consists of variables and coefficients. Variable are called unknown. We can apply arithmetic operations such as addition, subtraction, etc. But not divisible by variable.

Given

 I.  x + 2xyz

II.  9x³y²

III.  18x² + 5ab - 6y

IV. 4\rm x^{4} + 3x² - x - 4

<h3>To find </h3>

The polynomial expressions from least to greatest are based on their degree.

<h3>How to organize?</h3>

4\rm x^{4} + 3x² - x - 4 is a biquadratic ploynolmial.

18x² + 5ab - 6y is a cubic polynomial.

x + 2xyz is a quadratic polynomial.

9x³y² is a monomial polynomial.

So the order will be IV, III, I, and II.

More about the polynomial link is given below.

brainly.com/question/17822016

8 0
2 years ago
30 POINTS By looking at the intercepts, which linear function does the graph represent?
larisa86 [58]

C. f(x)=2/3x-2

<h2>Explanation:</h2>

Looking at the graph we realize that the y-intercept is given by:

b=-2

The Slope-intercept form of the equation of a line is given by:

y=mx+b

So, our equation becomes:

y=mx-2

So the only option that matches a negative y-intercept is C. Let's see that the slope m=2/3. Look at the y-intercept, if you increase x by 3 units, then y increases by 2 units and goes from x=-2 to x=0. In other words:

Change \ in \ x=\Delta x=3 \\ \\ Change \ in \ y=\Delta y=2 \\ \\ \\ m=\frac{\Delta y}{\Delta x}=\frac{2}{3}

<h2>Learn more:</h2>

Writing linear equations: brainly.com/question/12169569

#LearnWithBrainly

7 0
3 years ago
Hello fellow people please asnwer this will give brainliest if right!
elena-14-01-66 [18.8K]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write an equivalent ratio for 7:8 with 40 as one of the terms.
kvv77 [185]

Answer:

Step-by-step explanation:

Five equivalent ratios:

7:8  = 14:16

      = 21:24

      = 70:80

      = 49:56

      = 35:40

8 0
2 years ago
Pls give me the full answer
nikdorinn [45]

All of the Questions are solved on the images shown below. These images are from Microsoft Whiteboard that I created.

<h2>I'm in sixth grade, and don't know how to answer 2 and 5. So I'm only going to answer questions 1, 3 and 4. </h2>

really sorry about that

1. Answer = 90m²

3. Answer = 50in²

4. Answer = 108cm²

yup, this is how weird i am

I took the screen shot of answer 3 before 1 lol!

----------------------------------------------------------------------------------------------------------

so sorry I couldn't help on all problems

Always have more than 2 smiles so that you can share them to someone who doesn't have one! Me Happy! You Happy! EVERYONE HAPPY!

Thanks!

Have a great day!

:D

7 0
2 years ago
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