What are the answers?

Answer:

Probability that exactly two people out of a randomly  chosen group of five people have responded to a telephone call-in poll is 0.264.

Step-by-step explanation:

We are given that according to a recent New York Times poll, 25% of the public have responded to a telephone call-in  poll.

Also, five people have people have been randomly selected.

The above situation can be represented through binomial distribution;

[tex]P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r};x=0,1,2,3,.......[/tex]

where, n = number trials (samples) taken = 5 people

           r = number of success = exactly two

           p = probability of success which in our question is probability that

                 public have responded to a telephone call-in  poll, i.e; p = 25%

Let X = Number of people who have responded to a telephone call-in  poll

So, X ~ Binom(n = 5, p = 0.25)

Now, probability that exactly two people out of group of five people have responded to a telephone call-in poll is given by = P(X = 2)

                P(X = 2)  =  [tex]\binom{5}{2} \times 0.25^{2} \times (1-0.25)^{5-2}[/tex]

                               =  [tex]10 \times 0.25^{2} \times 0.75^{3}[/tex]

                               =  0.264

Therefore, the probability that exactly two people out of a randomly  chosen group of five people have responded to a telephone call-in poll is 0.264.

The probability of exactly two people responding is 0.262 in this case.

To calculate the probability that exactly two people out of a randomly chosen group of five people have responded to a telephone call-in poll, we need to use the binomial distribution formula. The formula is: P(X=k) = C(n, k) * p^k * (1-p)^(n-k), where P(X=k) is the probability that k people responded, C(n, k) is the number of ways to choose k people out of n, p is the probability of success (25% in this case), and n is the number of trials (5 in this case).

Plugging in the values: P(X=2) = C(5, 2) * (0.25)^2 * (0.75)^(5-2)

Simplifying and calculating, we get: P(X=2) = 10 * 0.0625 * 0.421875 = 0.26172

Rounding to the nearest thousandth, the probability that exactly two people out of a randomly chosen group of five people have responded to a telephone call-in poll is approximately 0.262.

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Answer:168

Step-by-step explanation:

Answer:

Step-by-step explanation:

x=30

Right traingles angles add up to 90 degrees so 30+60=90

I dont understand what the 14 is up there for though

I am very late for this question ;w;

Answer:

Find the probability distribution by dividing the number of houses in each category by the total number of houses. We find that Graph A most accurately shows the distribution.

Step-by-step explanation:

Let's start by finding the probability of randomly selecting a house in each category. To find the probability, divide the number of houses in the category by the total number of houses.

The total number of houses is 15 + 20 + 25 + 30 = 90. The number of 1 y/o houses is 15. Dividing these two numbers, we get 15/90 = 0.167

Make the same calculation for the other ages:

2 y/o: 20/90 = 0.222

3 y/0: 25/90 = 0.278

4 y/o: 30/90 = 0.333

Now, look at the graphs to determine which most closely matches these calculations. (Note: make sure to look closely at the axis.) That graph is A.

Answer:

  It is a solution, one of an infinite number of solutions.

Step-by-step explanation:

You can check to see if the given point is in the solution set:

  4(-4) +5(4) = -16 +20 = 4 > -6 . . . . yes

  -2(-4) +7(4) = 8 +28 = 36 > 20 . . . yes

The offered point satisfies both inequalities, so is in the solution set. It is not the solution, but is one of an infinite number of solutions.

Answer:

B

Step-by-step explanation:

The polynomial function shown in the graph is of even degree and has 2 real zeroes.

The polynomial function shown in the graph appears to have 2 real zeroes. Since the degree of the polynomial cannot be determined from the graph alone, we cannot determine if it is of odd or even degree. Therefore, option A) and B) can be eliminated. Thus, the correct answer is C) It is of even degree and has 2 real zeroes.

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Answer:

The answer is 16 I've seen this before so I would know. and your welcome

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

Answer:

54.16%

Step-by-step explanation:

The percentage of books that are some is 54.16 %

In order to find that answer you would have to calculate the total number of small books (26) over the total number of all of the books (48).

The equation would be 26/48=0.5416 however Multiply that answer by 100 and you would get 54.16% and if you want to round to the nearest whole number it would just be 54%

Answer:

No, they are not mutually exclusive because a customer can purchase a burger and fries together.

Step-by-step explanation:

Mutually exclusive events are events that cannot occur at the same time, e.g. I cannot sleep while running. In the case of a restaurant, you could consider purchasing pizza and burgers as mutually exclusive since most people would only purchase one of them (unless they eat a lot). But burgers and fries are not mutually exclusive because people can purchase them together.

Answer:

B) 2n/3

Step-by-step explanation:

twice a number n = 2 * n = 2n

divided by 3 = 2n/3

Answer:

d

Step-by-step explanation:

Answer:

There is no way of telling what the means

Step-by-step explanation:

I think your question missed key information, allow me to add in and hope it will fit the orginal one. Please have a look at the attached photo

My answer:

There is no way of telling what the means are because we do not the exactly number of the average daily temperatures even the narrow IQR for January  is but we can not make sure it is lower than the  IQR for December when having no real number.

Hope it will find you well.

Answer:

i dont know the first one but the second one is 97

Step-by-step explanation:

the lowest digit gets dropped

Answer:

1) 6394

2) 97, 9

Step-by-step explanation:

1)

WXYZ

X < Z

Z = ⅔W

W = ⅔Y

Y = 3X

W = ⅔(3X) = 2X

Z = ⅔(2X) = (4/3)X

X has to be a multiple of 3

If X = 3,

Y = 9

Z = 4

W = 6

WXYZ

6394

2)

917452; 97452; 9745; 975; _ ; _ ?

Just remove the smallest digit to get the next terms

97, 9

The correct steps are:

- Divide by 4 on both sides of the equation.

- Substitute 3 for p and multiply to check the solution.

To solve the equation 4p = 12, the following steps would be taken:

1. Divide by 4 on both sides of the equation. This step would simplify the equation to p = 12/4.

2. Substitute 12 for p and multiply to check the solution. This step would involve substituting 3 for p and multiplying, not substituting 12.

3. Substitute 3 for p and multiply to check the solution. This step is the correct approach to verify if the value of p obtained is a solution to the original equation.

So, the correct steps are:

- Divide by 4 on both sides of the equation.

- Substitute 3 for p and multiply to check the solution.

Answer:

it's A,C,E

Step-by-step explanation:

here is proof

Answer:

C. The alarm and security cameras were off when the theft took place

Step-by-step explanation:

Answer:

C is the correct answer

Step-by-step explanation:

Answer:

maybe the second one

Step-by-step explanation:

PLZ MARK BRAINLIEST DESPARATE FOR POINTS

Answer:

It's probably the fourth one

the answe

Step-by-step explanation:

the answer is 20

The angles are supplementary angles. Then the value of the variable 'x' will be 20.

The inclination is the separation seen between planes or vectors that meet. Degrees are another way to indicate the slope. For a full rotation, the angle is 360 °.

Supplementary angle - Two angles are said to be supplementary angles if their sum is 180 degrees.

Angle 7x and angle (x + 20) is the supplementary angles. Then the equation is given as,

7x + x + 20 = 180

Simplify the equation, then we have

7x + x + 20 = 180

8x = 160

x = 20

The angles are supplementary angles. Then the value of the variable 'x' will be 20.

More about the angled link is given below.

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Answer:

---------bar graph

Step-by-step explanation:

Answer: Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.

Step-by-step explanation:

4x - x + 5 = 8 - 3x - 3

Combine like terms

4x - x + 5 = 5 - 3x

Subtract x from 4x

3x + 5 = 5 - 3x

Add -3x to both sides

6x + 5 = 5

Subtract 5 from each side

6x = 0

Divide by 6

x = 0

Put 0 into the equation

4(0) - 0 + 5 = 8 - 3(0) - 3

Multiply

0 - 0 + 5 = 8 - 0 - 3

Subtract

5 = 5

Answer:

B

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Answer:

Which plant was taller when Nara got the plants? C. They were equally tall

Which plant grew faster?  B. The second plant

Step-by-step explanation:

Slope of the first plant :

m = (y2 - y1)/(x2- x1)

m = (36 - 34)/(15 - 10) = 0.4

y-intercept of the first plant :

y = m*x + b

b = y1 - m*x1

b = 34 - 0.4*10 = 30

From the picture we can see that the y-intercept of the second plant is 30 cm

Y-intercept represents plant heights when Nara got the plants; then they were equally tall

From the picture we can see that second plant grew 2 cm in 2 days; then its slope is 2/2 = 1

Slope measures how fast each plant grew; then the second plant grew faster

Answer:For a positive value k, the graph of y=kf(x) is obtained from the graph of y=f(x) by scaling in the vertical direction. In coordinates, if (x0,y0) is on the graph of y=f(x), then that point moves to (x0,ky0) on the graph of y=kf(x). Any point on the x-axis remains fixed (as then y=0). When k>1, the graph is stretched vertically (away from the x-axis), while if 0<k<1, the graph is compressed vertically (toward the x-axis).

Another way to think about this: The graph of y=kf(x) is exactly the same as the graph of y=f(x) if the y-axis is scaled so that 1 is relabeled k, 2↦2k, −1↦−k, etc.

Step-by-step explanation:

Answer:

C, due to 7 greater than 1

Answer:

y=7x+65

Step-by-step explanation:

You want to find the equation for a line that passes through the point (-9,2) and has a slope of 7.

First of all, remember what the equation of a line is:

y = mx+b

Where:

m is the slope, and

b is the y-intercept

To start, you know what m is; it's just the slope, which you said was 7. So you can right away fill in the equation for a line somewhat to read:

y=7x+b.

Now, what about b, the y-intercept?

To find b, think about what your (x,y) point means:

(-9,2). When x of the line is -9, y of the line must be 2.

Because you said the line passes through this point, right?

Now, look at our line's equation so far: . b is what we want, the 7 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the the point (-9,2).

So, why not plug in for x the number -9 and for y the number 2? This will allow us to solve for b for the particular line that passes through the point you gave!.

(-9,2). y=mx+b or 2=7 × -9+b, or solving for b: b=2-(7)(-9). b=65.

The equation of the line that passes through the point (-9,2) with a slope of 7

is

y=7x+65

Have a nice day!

Answer:

On average, Erika is much slower than Rita by 1 minute.

Step-by-step explanation:

There are two sets of data: Erika's and Rita's. Now, we have to find the average values for each of both and compare them. I would assume that the order of the presentation of data points is alternating, first for Erika followed by Rita. To illustrate what I mean, let's say in Day 1, Erika's time is 20 and Rita's time is 21.25. In Day 2, Erika's time is 21.5 and Rita's is 24.75. And so on and so forth. The complete tabulation is shown in the picture.

Erika's average = (20+21.5+22.75+23.25+20.25)/5 = 21.55

Rita's average = (21.25+24.75+23+23+20.75)/5 = 22.55

On average, Erika is much slower than Rita by 1 minute.

Answer:

C) 510 people per square kilometer

Step-by-step explanation:

Population Density = Population/Area

= 2,550,000/5000

= 2,550/5

= 510 people per square kilometer

The approximate population density of Miami-Dade County in 2011 was 510 people per square kilometer.

Population density is a measurement of population per unit of land area.

Given that, in 2011,Miami-Dade County had a population of about 2.55 million people and covered an area of about 5000 square kilometers.

We need to find the population density of Miami-Dade County in 2011

So,

To calculate the population density, you will divide the population by the size of the area.

Thus, Population Density = Number of People/Land Area.

The unit of land area should be square miles or square kilometers.

Therefore,

= 2,550,000/5000

= 2,550/5

= 510 people per square kilometer

Hence, the approximate population density of Miami-Dade County in 2011 was 510 people per square kilometer.

Learn more about population density, click,

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Answer:

We start with 11 marbles. The first marble selected is green, so P(green) = 2/11. Since this marble is replaced, we still have the same 11 marbles. The second marble selected is yellow, so P(yellow) = 3/11. It follows that P(green, then yellow) = (2/11)(3/11) = 6/121.

Answer:    13.2489 Liters

Step-by-step explanation:

Answer:

[tex]13.2489l[/tex]