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3 years ago

4x-3=5x-21 what does x=

Mathematics

1 answer:

torisob [31]3 years ago

3 0

U subtract 4x by 5x and then you add 3 by -21 and the answer is x=18

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A hiker leaves the Visitor Center traveling East-by-North East. She hikes 13 miles before

djyliett [7]

Answer:

both or neither as they are the same distance to rescue her

total distance is her 13 plus 12 headed west and 5 headed south so 30

Step-by-step explanation:

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3 years ago

Y + 0.4 = 2<br> HELP MEEE ull GET BRAINLIEST PLEASE

allochka39001 [22]

Answer: Y= 1.6

Step-by-step explanation: 1.6 + 0.4 =2

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3 years ago

Read 2 more answers

The neighborhood swimming pool is 14 feet long, 11 feet wide, and 3 feet deep. Which formula below should be used to find how mu

My name is Ann [436]

Answer:

D. 14 feet × 11 feet × 3 feet

Step-by-step explanation:

The volume of a rectangular prism is the product of its dimensions:

V = LWH

V = (14 ft)(11 ft)(3 ft) . . . . . matches choice D

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1 year ago

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

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

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

What is the required sample size for the new study?

This is n for which M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2$

$n = 800.3$

Rounding up:

The required sample size for the new study is 801.

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2 years ago

The school is located where Wilson Street and Green Street intersect. Which ordered

blondinia [14]

(5,3) is the answer for the current question

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2 years ago