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1 year ago

I need help on question 4 and 10

Mathematics

1 answer:

nevsk [136]1 year ago

5 0

The equivalent sets are <u>X n Y = { } and X U Y= {5, 6, 7,8, 9, 10, 12 ,14}</u>

<h3>Set theory and notation</h3>

Given the following sets expressed as;

X = {8, 10, 12, 14}

Y = {5, 6, 7, 8,9}

Since union means the combination of all the elements in both sets and intersection is the common elements in the set, hence;

X n Y = { }

X U Y= {5, 6, 7,8, 9, 10, 12 ,14}

Note that the intersection is an empty set since there is no common element

Learn more on set theory here: brainly.com/question/13458417

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chlorine is a gas for all temperatures greater than -31*F. If F represents temperature in degrees Fahrenheit, the inequality F&g

solmaris [256]

Answer:

C > -35

Step-by-step explanation:

9/5C +32 > -31

9/5C > -63

C > -63(5/9)

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2 years ago

Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was

andrezito [222]

Answer:

The 92% confidence interval for the true proportion of customers who click on ads on their smartphones is (0.3336, 0.5064).

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:

$n = 100, p = 0.42$

92% confidence level

So $\alpha = 0.08$ , z is the value of Z that has a pvalue of $1 - \frac{0.08}{2} = 0.96$ , so $Z = 1.75$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 - 1.75\sqrt{\frac{0.42*0.58}{100}} = 0.3336$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 - 1.75\sqrt{\frac{0.42*0.58}{100}} = 0.5064$

The 92% confidence interval for the true proportion of customers who click on ads on their smartphones is (0.3336, 0.5064).

4 0

3 years ago

Solve 1/3x - 5/6x =1/4

Harrizon [31]

Answer:

-1/2

Step-by-step explanation:

Given:

$\frac{1}{3}x - \frac{5}{6} x = \frac{1}{4}$

Find the common denominator for the fractions, which is 6. Rewrite 1/3 as 2/6.

$\frac{2}{6}x - \frac{5}{6} x = \frac{1}{4}$

Combine like terms.

$-\frac{3}{6} x = \frac{1}{4}$

Simplify.

-0.5x = 1/4

Divide both sides by -0.5.

x = -1/2 = -0.5

Please mark as Brainliest! :)

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3 years ago

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sesenic [268]

Answer:

Step-by-step explanation:

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3 years ago

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expeople1 [14]

Answer:

he earned 8 dollars in interest

Step-by-step explanation:

800(1+(.02)(.5))

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2 years ago