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2 years ago

Can y’all help me please

Mathematics

2 answers:

BigorU [14]2 years ago

6 0

I think A is the answer.

muminat2 years ago

5 0

Answer:

1. 4m(note this might be switched with 2)

2. 5m(note this might be switched with 1)

3.3m

4. 60

5.60

Step-by-step explanation:

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S is a subset within a universal set, U. If S = {x, y, 4, 9, ?), which could describe U? U = {keys on a keyboard}

Katyanochek1 [597]

Since U is a universal set where S is its subset, then set U should consist of all the letters, numbers and punctuation mark in a keyboard. In other words, universal set U consists of the following elements:
U = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
U = (x| x comprised of all the letters in the alphabet fro a to z)
U = (!,.,,,?,!:,;,",',-)

4 0

3 years ago

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Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic t.

lawyer [7]

Using the t-distribution, it is found that the p-value of the test is 0.007.

At the null hypothesis, it is tested if the mean lifetime is not greater than 220,000 miles, that is:

$H_0: \mu \leq 220000$

At the alternative hypothesis, it is tested if the mean lifetime is greater than 220,000 miles, that is:

$H_1: \mu > 220000$ .

We have the standard deviation for the sample, thus, the t-distribution is used. The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.
$\mu$ is the value tested at the null hypothesis.
s is the standard deviation of the sample.
n is the sample size.

For this problem:

$\overline{x} = 226450, \mu = 220000, s = 11500, n = 23$

Then, the value of the test statistic is:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{226450 - 220000}{\frac{11500}{\sqrt{23}}}$

$t = 2.69$

We have a right-tailed test(test if the mean is greater than a value), with t = 2.69 and 23 - 1 = 22 df.

Using a t-distribution calculator, the p-value of the test is of 0.007.

A similar problem is given at brainly.com/question/13873630

8 0

2 years ago

I need help ASAP !!!!!!!!!

antiseptic1488 [7]

the anser would be great to have a male or female plastic surgery and then you can get a chance to win the game is to be like that in mind that I have to be high as a kite to get the best way for me to do with my friends and family

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3 years ago

2x+1-14x=-71 please help me solve this

Alex_Xolod [135]

Step-by-step explanation:

add the like terms

2x - 14x = -71 -1

-12x = -72

12x = 72

x = 6

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3 years ago

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Determine the x- and y- intercepts for the graph defined by the given equation.

RSB [31]

Answer:

Y-intercept is (0,8)

Step-by-step explanation:

The line of an equation is y=mx+b. M in this case is 1 and "b" is the y intercept. since in the place of b is positive 8 the y-intercept is 8

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3 years ago

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