3 years ago

Is brainly still not working?

Mathematics

2 answers:

Mumz [18]3 years ago

4 0

Answer:

Yup:(

Step-by-step explanation:

SSSSS [86.1K]3 years ago

3 0

Answer:

I was wondering the same thing. I cant see answers. Smh

Step-by-step explanation:

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Please help<br> See picture

Leto [7]

Answer:

B, 9/4 = 9 * 1/4

Step-by-step explanation: $\frac{9}{1} * \frac{1}{4} = \frac{9}{4}$ . Just multiply the numerator by the numerator and denominator by the denominator.

7 0

3 years ago

Which of the following expression is a rational expression

Setler [38]

Answer:

where is the rational expression

you need to upload a picture

Step-by-step explanation:

i will answer once you upload the picture

3 0

3 years ago

Please delete my all question

PolarNik [594]

Answer: what do you mean ?

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

PLEASE ANSWER I WILL GIVE YOU BRAINIEST IF CORRECT!!!!!!!<br> thanks!!

xeze [42]

Answer:

100*5(120) = $60,000 for 120 students

Step-by-step explanation:

4 0

3 years ago

In a certain country, the average age is 31 years old and the standard deviation is 4 years. If we select a simple random sample

KengaRu [80]

Answer: 0.0062

Step-by-step explanation:

Given : Mean : $\mu=\ 31$

Standard deviation : $\sigma= 4$

Sample size : $n=100$

Assume that age of people in the country is normally distributed.

The formula to calculate the z-score :-

$z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

For x = 32

$z=\dfrac{32-31}{\dfrac{4}{\sqrt{100}}}=5$

The p-value = $P(x\geq32)=P(z\geq5)$

$=1-P(z$

Hence, the the probability that the average age of our sample is at least =0.0062

3 0

4 years ago