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2 years ago

Please help I don't understand i'm in the lowest class?

Mathematics

1 answer:

Anna71 [15]2 years ago

6 0

Answer:

Step-by-step explanation:

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A school has 3400 students. They conduct a random sample of 124 students and find that 38 of them hate the school.

Contact [7]

Answer:

a) We need a sample size of at least 2401.

b) We need a sample size of at least 1936.

Step-by-step explanation:

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

In which

z is the zscore that has a pvalue of .

The margin of error is:

95% confidence level

So , z is the value of Z that has a pvalue of , so .

(a) you are unwilling to predict the proportion value at your school and

We use , which is when we are going to need the largest sample size.

So we need to find We need a sample size of at least 2401.

(b) you use the results from the surveyed school as a guideline.

Now the same calculation, just with . So

We need a sample size of at least 1936.

5 0

3 years ago

100 POINTS Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match the systems of equations

OLEGan [10]

Answer:

2x + y = 12 x = 9 − 2y x + 2y = 9 2x + 4y = 20 x + 3y = 16 2x − y = 11 y = 11 − 2x 4x − 3y = -13 y = 10 + x -3x + 3y = 30 2x + y = 11 x − 2y = -7 x = 2, y = 7 arrowRight x = 5, y = 2 arrowRight x = 3, y = 5 arrowRight x = 7, y = 6

Step-by-step explanation:

4th

6 0

2 years ago

Read 2 more answers

Create 2 lines thatare parallel to 8x + 2y = 7?

Alinara [238K]

d1 = ax + by + c = 0 and d2= mx + ky + f = 0

if they are parallel :

$\frac{a}{m} = \frac{b}{k} \neq \frac{c}{f}$

8x + 2y = 7

8x + 2y - 7 = 0

8x + 2y -9 = 0
4x + y -6 = 0
16x + 4y - 19 = 0

you can create more whatever you want =)

Hope this helps ^-^

7 0

3 years ago

May I please get help.

Karo-lina-s [1.5K]

Answer:

$y = -\frac{2}{3} +6$

Step-by-step explanation:

To be parallel to the original line, the slope has to be the same $(-\frac{2}{3})$ . For the line to go through the point (6,2) the y-intercept has to be 6.

The graph shows the original line (black) and new line that goes through the point (yellow).

Hope it helps!

3 0

3 years ago

PLEASE HELP REWARDING BRAINLIEST

svetlana [45]

An exponential function is expressed in the form y=axb^x. The relation represents a growth when b>1 and a decay when 0<b<1.

Have a great day! Hope this helps!

4 0

3 years ago