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3 years ago

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The graph shows an image of a dilation about the origin with a scale factor of . What are the coordinates of the pre-image of ,

point A? (–8, –12) (–12, –8) (–2, –3) (–3, –2)

1 answer:

timama [110]3 years ago

7 0

Answer:

A- (-8,-12)

Step-by-step explanation:

I got it right on the test

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A statistics teacher started class one day by drawing the names of 10 students out of a hat and asked them to do as many pushups

mash [69]

Using the t-distribution, we have that the 95% confidence interval for the true mean number of pushups that can be done is (9, 21).

For this problem, we have the <u>standard deviation for the sample</u>, thus, the t-distribution is used.

The sample mean is of 15, thus $\overline{x} = 15$ .
The sample standard deviation is of 9, thus $s = 9$ .
The sample size is of 10, thus $n = 10$ .

First, we find the number of degrees of freedom, which is the one less than the sample size, thus df = 9.

Then, looking at the t-table or using a calculator, we find the critical value for a 95% confidence interval, with 9 df, thus t = 2.2622.

The margin of error is of:

$M = t\frac{s}{n}$

Then:

$M = 2.2622\frac{9}{\sqrt{10}} = 6$

The confidence interval is:

$\overline{x} \pm M$

Then

$\overline{x} - M = 15 - 6 = 9$

$\overline{x} + M = 15 + 6 = 21$

The confidence interval is (9, 21).

A similar problem is given at brainly.com/question/25157574

6 0

3 years ago

the local movie theater keeps track of its daily ticket sales during the first 8 days of the month there was a total of 2736 tic

snow_tiger [21]

my answer is 684 tickets were sold every 2 days.

6 0

3 years ago

Triangle ABC is a right triangle.

Mashcka [7]

Answer:

x = 11.75

Step-by-step explanation:

m∠A + m∠B must equal 90

5x + 3x - 4 = 90

8x = 94

x = 11.75

3 0

3 years ago

Suppose that telephone calls arriving at a switchboard follow a Poisson process with an average of 5 calls per minute. What is t

postnew [5]

Answer:

The correct answer is "0.0842".

Step-by-step explanation:

Given:

X = 5

By using the Poisson's distribution formula, we get

The probability will be:

⇒ $P(x=2)=\frac{\lambda^x.e^{-\lambda}}{x!}$

By substituting values, we get

$=\frac{(5)^2\times e^{-5}}{2!}$

$=\frac{25\times e^{-5}}{2!}$

$=0.0842$

5 0

3 years ago

What is the surface area of this rectangular prism that has 9 ft a width of 5 feet and a height of 7.5ft

daser333 [38]

To get your answer:

9 times 5 times two= 90
9 times 7.5 times two= 135
5 times 7.5 times two= 75

then add all of them together and you will get the surface area
90+135+75=300
you should have an answer of 300 feet²

6 0

3 years ago

Read 2 more answers