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3 years ago

Pleaseeeeeeeeeeeeeeeeee hellpppppppp urgent. pleaseeeeeeee

Mathematics

1 answer:

Nastasia [14]3 years ago

3 0

Answer:

first u have to write in the equation

Step-by-step explanation:

ooops my ph is hanged

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What is the solution to the system of equations? y=-x+5 y=x-1

MakcuM [25]

Answer:

(3,2)

Hope this is right .-.

8 0

3 years ago

Suppose a sample of 972972 tenth graders is drawn. Of the students sampled, 700700 read above the eighth grade level. Using the

max2010maxim [7]

Answer:

The 85% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.259, 0.301).

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 $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

972 students, 700 read above the eight grade level. We want the confidence interver for the proportion of those who read at or below the 8th grade level. 972 - 700 = 272, so $n = 972, \pi = \frac{272}{972} = 0.28$

85% confidence level

So $\alpha = 0.15$ , z is the value of Z that has a pvalue of $1 - \frac{0.15}{2} = 0.925$ , so $Z = 1.44$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.28 - 1.44\sqrt{\frac{0.28*0.72}{972}} = 0.259$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.28 + 1.44\sqrt{\frac{0.28*0.72}{972}} = 0.301$

The 85% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.259, 0.301).

3 0

3 years ago

Three friends are travelling by aeroplane and want to pay as little as possible in total for their luggage.

In-s [12.5K]

Answer:

B.25$

Step-by-step explanation:

to make the money less one of the freinds will carry 9kg and the other 12 kg the last one carries the left luggage weighing 7kg and 6kg which add up to 13kg.

the first freind won't pay anything as he is passing 9kg luggage

the second will pay : 12-10 =2 so 2kg*5$=10$

the last freind will pay 13-10=3 so 3kg*5$=15$

to find the total money the pay we will add 10$ and 15$ which became 25$.

hope this helped.

4 0

3 years ago

Calvin works at smokin sally’s barbecue restaurant and keeps track of the numbers of customers who visit the restaurant over a f

saul85 [17]

Answer:

Step-by-step explanation:

Dbbdhdbjsbsjsbsbns

5 0

3 years ago

Complete the inequality statement. 5/8___7/12

Alborosie

$[Hello,BrainlyUser]$

Answer:

5/8 < 7/12

Step-by-step explanation:

To find which is greater we can turn them into a decimal..

5/8 ⇒ 0.625

7/12 ⇒ 0.583

Then, we compare the two decimal numbers to get the answer.

0.625 is greater than 0.583.

Therefore, 5/8 is greater than 7/12 .

CloudBreeze]

5 0

2 years ago

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Pleaseeeeeeeeeeeeeeeeee hellpppppppp urgent. pleaseeeeeeee​

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