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3 years ago

Solve for x in the diagram below

Mathematics

1 answer:

blagie [28]3 years ago

5 0

Answer:

The value of x is 15 degrees

Step-by-step explanation:

we know that

$60^o=(x+45)^0$ ----> by vertical angles

solve for x

$x=60-45=15^o$

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A survey conducted in July 2015 asked a random sample of American adults whether they had ever used online dating (either an onl

Natasha2012 [34]

Answer:

The 99% confidence interval is (0.0787, 0.1613).

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 interval 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:

The survey included 411 adults between the ages of 55 and 64, and 50 of them said that they had used online dating. This means that $n = 411, \pi = \frac{50}{411} = 0.12$

The 99% confidence interval is

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 - 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.0787$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{411}} = 0.12 + 2.575\sqrt{\frac{0.12*0.88}{411}} = 0.1613$

The 99% confidence interval is (0.0787, 0.1613).

3 0

4 years ago

(2x3 + 7x2 - 6x - 8) = (x + 4)

Sauron [17]

Answer:

the answer is 2x^2 − x − 2

8 0

3 years ago

1/4 + 1/2 ÷ 3/8 = ?<br><br><br> Please Answer quickly im in a test!

White raven [17]

Answer:

Step-by-step explanation:

Three eights

8 0

3 years ago

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Is 5.731 an rational number and integer or whole number

Delicious77 [7]

Answer:

<h3>Rational number</h3>

Step-by-step explanation:

A rational number are number that can be written as the ratio of two integers. Integers are whole numbers and they can be positive or negative including zero.

Looking at the value 5.371, we can write it in fraction form as shown;

5.371 = 5371/1000

Since 5.371 is equivalent to 5371/1000 and <em>5371/1000 is a ratio of two integers 5371 and 1000 therefore we can conclude that 5.731 is a rational number</em>

<u>Note that decimal numbers are not integers and are not whole numbers.</u>

6 0

3 years ago

Pls help tysm and its 20 points<br><br> do alll the ordered pairs

mars1129 [50]

Answer:

well if it is a negative you now its a no but no negative then it is a yes

Step-by-step explanation:

1. 3,2=yes

2. -6-6=no

and so on

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3 years ago

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