the diameter, in centimeters (cm), of each tree in a random sample of trees in a forest was measured. the histogram shown summarizes the diameters.

If we want to estimate 97% confidence interval for the true proportion of Americans who support gun control in 2019 with a 0.27 margin of error, then 16 Americans must be surveyed.

Given,

The confidence level =97%

Critical z value of 97% confidence interval =2.170

Margin error E= 0.27

We know,

Sample size n= [tex]0.25(\frac{z}{E})^{2}[/tex]

Substitute the values in the equation

[tex]n=0.25(\frac{2.170}{0.27})^{2}\\ n=0.25( 8.03)^{2}[/tex]

n=16.12

n≈16

Hence, if we want to estimate 97% confidence interval for the true proportion of Americans who support gun control in 2019 with a 0.27 margin of error, then 16 Americans must be surveyed.

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Answer: x3+5x2+6x

Hope this helps

The solution for x and y for the given expression are :

x =1/2y + −1/2 and y=2x+1 respectively.

What is Algebraic expression ?

Algebraic expressions are the idea of expressing numbers using letters or alphabets without specifying their actual values. The basics of algebra taught us how to express an unknown value using letters such as x, y, z, etc. These letters are called here as variables. An algebraic expression can be a combination of both variables and constants. Any value that is placed before and multiplied by a variable is a coefficient.

Here, the given equation is : 16x + 9 = 9y - 2x

Now,

solving for x :

16x+9=9y−2x (Add 2x to both sides.)

16x+9+2x=−2x+9y+2x

18x+9=9y

18x+9+−9=9y+−9 (Add -9 to both sides)

18x=9y−9

18x/18 = 9y−9/18 (Divide both sides by 18.)

x =1/2y + −1/2

solving for y :

16x+9=9y−2x

−2x+9y=16x+9 (Flip the equation.)

−2x+9y+2x=16x+9+2x (Add 2x to both sides.)

9y=18x+9

9y/9=18x+9/9 ( Divide both sides by 9.)

y=2x+1

Therefore, the solution for x and y for the given expression are :

x =1/2y + −1/2 and y=2x+1 respectively.

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The dimension which this rug should have is 23 feet × 13 feet.

Mathematically, the area of a rectangle can be calculated by using this formula;

A = LW

Where:

Let x represent the width of this rug.

Also, the dimension of this rug is given by:

299 = (29 - 2x) × (19 - 2x)

299 = (29 - 2x)(19 - 2x)

Evaluating the equation, we have:

299 = 551 - 58x - 38x + 4x²

4x² - 58x - 38x + 551 - 299 = 0

4x² - 96x + 252 = 0

Dividing all through by 4, we have:

x² - 24x + 63 = 0

x² - 21x - 3x + 63 = 0

x(x - 21) - 3(x - 21) = 0

(x - 3)(x - 21) = 0

x = 3 or 21 feet.

Note: The plausible solution is x = 3.

Therefore, the width and length of this rug is given by:

Length = 29 - 2(3)

Length = 29 - 6

Length = 23 feet.

Width = 19 - 2(3)

Width = 19 - 6

Width = 13 feet.

In conclusion, the dimension of this rug is 23 feet × 13 feet.

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Answer:

472.25

Step-by-step explanation:

1,889 divided by 4 = 472.25

you need a calculator haha

472.25

Answer:

< DGB = 101

Step-by-step explanation:

< CGB is equal to 79

< CGB is another name for < 1

We want to find < DGB which is another name for <2

< 1 and < 2 are a linear pair

<1 + <2 = 180

79 + <2 = 180

<2 = 180-79

<2 = 101

< DGB = 101

Answer:

The answer is 101

Step-by-step explanation:

Since a line has an angle of 180°

To know DGB we will just subtract 79 from 180

hence DGB=180°-79°

=101°

The equation that can be used to determine the cost of one drink is d = $12.8 / $2.

The total amount that is paid by Stephen and Paul is the sum of the total cost of the movie tickets, the cost of the drinks less the cost of the coupon.

Total amount paid = cost of two tickets + cost of the two drinks - coupon

($11 x 2) + ($d x 2) - $5 = $29.18

$22 + $2d - 5 = $29.18

$2d = $29.18 + $5 - $22

$2d = $12.18

d = $12.8 / $2

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Answer:

40

Step-by-step explanation:

If the student ran 4 miles for 5 days multiply 4 by 5 and you get 20. Then just do the same thing for 5 more days. Also, 20.  Then add 20 + 20 and you get 40

Harriette has 58 songs in her playlist.

No of the songs in Lashondra's playlist = Nine times Harriette's playlist

No of the songs in Velora's playlist = Seven times Harriette's playlist

Total number of songs combined by all = 986

Let the number of songs in Harriette's playlist be x.

According to the problem,

9x + 7x + x = 986

⇒ 17x = 986

⇒ x = 58

Answer) Harriette's playlist has 58 songs.

         We have taken the number of songs in Harriette's playlist as x as the other numbers were given in relation to this playlist. Thus, the variable is used to create a generalized formula.

         Since the total number of songs is given, we can carry out simple algebraic addition and simplification to find out the answer.

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The entire question is given below:

Lashondra's playlist has 9 times as many songs as Harriette's playlist.-Velora-has 7 times as many songs on her playlist as Harriette does. If they combined their playlists, they would have 986 songs. How many questions does Harriette have in her playlist?

According to the given information The highest 10% of the population's IQ is 0.0179.

The root of the variability in the given group as well as ungrouped data is referred to as the standard deviation. The standardized value is the value left after subtracting the mean and dividing by the standard deviation.

z =   (x- μ) / σ

x denotes the observations (a specific value that you are calculating the z-score for).

Mu(μ) is the mean.

Sigma(σ) denotes the standard deviation.

x = 131.5

μ = 200

σ = 15

So, when humans apply the values to the formula, we obtain,

=> z = 131.5 - 100 /15

=> z = 2 .10

Using table A-2, calculate the corresponding probability:

=> P(Z>2.10) = 1 − P(Z<2.10)

=> 1 − 0.9821

=> 0.0179

The top 10% of the population has a required IQ of 0.0179.

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Answer:

There were 248 adult tickets and 248 kid tickets.

Step-by-step explanation:

a = number of adult tickets

k = number of kid tickets

a + k = 524                                 10a + 5k = 3860

Multiply the equation on the right all the way through by -5 so that we can eliminate the k's when we add the equations together.

-5(a+ K) = 524(-5)

-5a - 5k = -2620

Add the two equations together:

-5a - 5k = -2620

10a + 5K = 3860

5a           = 1240  Divide both sides by 5

a = 248  There are 248 adult tickets.  Plug in 248 for a in either of the original equations.

a + k = 524

248 + k = 524  Subtract 248 from 524 to find the number of kid tickets.

There are 276 kid tickets.

Check:

Plug in 276 for k and 248 for adult to both equations to see if they work

a + k = 524

248 + 276 = 524

524 = 524

10a + 5k = 3860

10(248) + 5(276) = 3860

2480 + 1380 = 3860

38060 = 3860

Answer:

1 3/4

Step-by-step explanation:

so the question will be done like this

5 =3x-1/4

The (-1/4) will go to the other side where 5 is and the equation becomes

5+1/4=3x which will be

7/4=3x hence you divide both sides by 3 to get the value of x as 1 as the whole number and 3/4 as the remainder

Answer:

x = 7

Step-by-step explanation:

[tex]5=\frac{3x-1}{4}[/tex]

multiply both sides by 4 (Multiplication property of equality)

[tex]20=3x-1[/tex]

add both sides by 1 (Addition property of equality)

[tex]21=3x[/tex]

divide both sides by 3 (Division property of equality)

[tex]7 = x[/tex]

switch sides (Symmetric property of equality)

[tex]x=7[/tex]

The value of A is 35.

The given expression is as follows:

sin A = cos (A + 20)

using trigonometric rule,

sin A = cos(90 - A)

Therefore,

cos (A + 20) = cos(90 - A)

divide both sides by cos

Hence,

A + 20 = 90 - A

A + A = 90 - 20

2A = 70

divide both sides by 2

A = 70 / 2

A = 35

Therefore, the value of A is 35.

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Answer:

x<4

Step-by-step explanation:

Hello,

[tex]2x - 2 < 6[/tex]

[tex]2x < 6 + 2[/tex]

[tex]2x < 8[/tex]

[tex] \frac{2x}{2} < \frac{8}{2} [/tex]

[tex]x < 4[/tex]

Answer:0.66

Step-by-step explanation:

hope this helps

Answer:0.66

Step-by-step explanation:33%50=0.66

Answer:

x = 39

Step-by-step explanation:

As we can see in the diagram, the triangle is a right-angled triangle, meaning that one of the angles inside the triangle has a measure of 90°.

Whenever we have a right-angled triangle and are given the lengths of two of its sides, and we are asked for the length of the third side, we must use the Pythagorean theorem, which states that:

[tex]\boxed{\mathrm{a^2 + b^2 = c^2}}[/tex],

where:

c = hypotenuse (longest side, opposite to 90° angle)

a, b = the two other sides of the triangle.

In this question, we are asked for the value of x, which is the hypotenuse of the given triangle, while the lengths of the other two sides are 15 and 36.

Therefore, using the Pythagorean theorem, we get:

[tex]15^2 + 36^2 = x^2[/tex]

⇒ [tex]x = \sqrt{36^2 + 15^2}[/tex]

⇒ [tex]x = \sqrt{1296 + 225}[/tex]

⇒ [tex]x = \sqrt{1521}[/tex]

⇒ [tex]x = \bf 39[/tex]

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Answer:

39

Step-by-step explanation:

This is called the Pythagorean Theorem. You are trying to find x or the hypotenuse. The a and b side are the two shorter side of the triangle(the a and b side can be interchangeable), these are the legs. The c side is the hypotenuse the long side. Plug in the numbers to the formula and get your answer.

Answer:

18

Step-by-step explanation:

because i smart it's will be 18

Answer: $29.52

Step-by-step explanation: 82x0.6=49.2 82-49.2=32.8 32.8x0.1=3.28

32.80-3.28=29.52

Answer:

d^2+15d+1

Step-by-step explanation:

group like terms

d^2+14d+d-4+5

simply like terms

d^2+15d+1

however, the answer is d^2+15d+1

The Volume generated when the region between the curves is rotated around the y - axis is 1216500335.46

Volume of the curves:

The volume of the solid formed by revolving the region bounded by the curve x = f(y) and the y-axis between y = c and y = d about the y-axis is given by

V = π ∫dc [f(y)]2dy.

The cross-section perpendicular to the axis of revolution has the form of a disk of radius R = f(y).

Given,

y = x³

Here we have to find the volume along to the y axis.

With limit as y = 0 and y = 27.

When we apply the values it can be written as,

=>[tex]V=\pi \int\limits^0_{27} {(x^3)^2} \, dx[/tex]

[tex]\implies V=\pi \int\limits^0_{27} {(x^6)} \, dx[/tex]

Apply the limits then we get,

[tex]\implies V = \pi [0^6 - (27)^6][/tex]

=> V = π [0 - 387420489]

=> V =   π x 387420489

=> V = 1216500335.46

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The test results of the study's subjects serve as the sample.

The portion of the population from which data was actually gathered is known as a sample.

Sample = Hours of sleep and maths test score of the volunteers that were included in the study.

A population is the total group about which you want to draw conclusions. A sample is the specific group from which you will collect data. Always, the sample size is less than the whole population.

A population in research doesn't usually refer to humans. It can refer to a collection of whatever you desire to study, including things, occasions, groups, nations, species, and animals.

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.

Answer:89

Step-by-step explanation:add them all together and divide by however many numbers you have

Answer:

Hello, Hope your having a good day

Step-by-step explanation:

your Question; what is the mean of 76,88,100,75,95,100

The mean is 89

Median: 91.5

Mode: 100

What is a mean?

The mean of a data set is commonly known as the average. You find the mean by taking the sum of all the data values and dividing that sum by the total number of data values.

Hope this helped :)

pls like

Answer:

X+90 = 147 ( sum of two interior angles equals opposite/adjacent exterior angle)

X = 147 - 90

X = 57

Answer:b

eez nuts srry

Step-by-step explanation:

Answer:

Step-by-step explanation:

A function assigns the value of each element of one set to the other s/p

Step-by-step explanation:

The line should go: 0, 1/3, 2/3, 1, 1 1/3, 1 2/3, 2 or 0, 0.33, 0.66, 1, 1.33, 1.66, 2 depending on how it's needed (decimals repeating)

Answer: y = 7x + 5 (maybe, please make sure, I'm very doubtful of myself sometimes)

Step-by-step explanation:

1. With the given numbers, m is slope, so 7 is the slope and b is y-intercept, and 5 is the y-int in this case.

2. This is hinting that the equation is in slope intercept form, which is      y = mx + b.

3. Since y = mx + b is the formula, then it means y = 7x + 5 is the likely answer

To solve the inequality, add 13 to both sides. The solution is y < 15 or (∞, 15)

Tips to solve linear inequalities:

Interval notation is often used for the solution(s). Recall the differences between a bracket [ or ], and a parenthesis (  or ). A bracket means the endpoint is included in the solution while a parenthesis means the endpoint is not included in the solution. Remember, infinity ∞ always use a parenthesis.

Example:  x ≥ 2 can be written as [2, ∞), while

                x > 0 is written as (2, ∞)

The given problem:

y-13 < 2

Add 13 to both sides. Adding a number to both sides will not change the inequality. Hence,

y -13 + 13 <  2 + 13

y < 15

Using the interval notation, the solution is (∞, 15)

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Answer: 4.25

 x

10

−

4

Step-by-step explanation:

Answer:

4.25x10^-9

Step-by-step explanation:

Answer:

1 1/2

1/2

2 hours

Step-by-step explanation:

Answer: 1/2 hour and 1/2 hour and 1 hour

Step-by-step explanation:

Hope this helps you! :) Have an Amazing day! ^-^