Help please anyone you guys are the best

Answer:

340

Step-by-step explanation:

289=85%*x

289=.85*x

289/.85=x

x=340

a) Margine of error for the proportion of all U.S. adults who think things are on the wrong track for 95% confidence is 0.019.

b) Correct answer is B. One is 95% confident that the observed proportion of adults that responded "Wrong Track" is within ±0.019 of the population proportion.

a) To calculate the margin of error for the proportion of all U.S. adults who think things are on the wrong track for 95% confidence, we can use the following formula:

ME = z√((p(1-p))/n)

Where:

z = the z-score associated with the desired level of confidence (in this case, 1.96 for 95% confidence)

p = the proportion of adults in the sample who said things are on the wrong track

n = the sample size

Using the percentages provided in the question, we can calculate the sample proportion:

p = % of adults who said things are on the wrong track / 100

p = % / 100 = %

So, p =

We don't have the sample size, but we can assume it's large enough (at least 30) to use the normal distribution approximation. Therefore, we can use the percentages directly to calculate the margin of error:

ME = 1.96√((0.490.51)/n)

ME = 1.96√(0.2499/n)

ME = 1.96(0.499/n¹/²)

ME = 0.019

Hence the margine of error is 0.019.

b) The margin of error means that if we were to conduct the same survey many times and calculate a 95% confidence interval for the proportion of all U.S. adults who think things are on the wrong track using each sample, we would expect the true population proportion to be within ±0.019 of the sample proportion in 95% of the intervals.

Therefore, the correct answer is B. One is 95% confident that the observed proportion of adults that responded "Wrong Track" is within ±0.019 of the population proportion.

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Therefore, the length of the diagonal of the rectangle is approximately 193.57 cm or 49.43 cm, depending on which value of x is used.

Perimeter is the total distance around the edge of a two-dimensional shape. It is the sum of the lengths of all the sides of the shape. For example, the perimeter of a rectangle is found by adding the lengths of its four sides.

Here,

(i) Let the length of the rectangle be y cm.

Then, the perimeter of the rectangle is given by:

2(x + y) = 112

x + y = 56

y = 56 - x

(ii) The area of the rectangle is given by:

Area = length x breadth

597 = yx

Substituting y = 56 - x, we get:

597 = x(56 - x)

597 = 56x - x²

x² - 56x + 597 = 0

(iii) Using the quadratic formula,

x = (-(-56) ± √((-56)² - 4(1)(597))) / (2(1))

x = (56 ± √(3136 - 2388)) / 2

x = (56 ± √(748)) / 2

x = (56 ± 2√(187)) / 2

x = 28 ± √(187)

Therefore, the two solutions are x = 28 + √(187) and x = 28 - √(187).

(iv) The length of the rectangle is y = 56 - x.

Using Pythagoras theorem, the length of the diagonal of the rectangle is given by:

d² = y² + x²

d² = (56 - x)² + x²

d² = 3136 - 112x + 2x²

d = √(3136 - 112x + 2x²)

Substituting the value of x from part (iii) into the above equation, we get:

d = √(3136 - 112(28 ± √(187)) + 2(28 ± √(187))²)

d = √(3136 - 3136 ± 112√(187) + 56 ± 56√(187) + 2(187))

d = √(37400 ± 168√(187))

d ≈ 193.57 cm (rounded to 2 decimal places) or d ≈ 49.43 cm (rounded to 2 decimal places)

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The appropriate test to examine the relationship between the number of steps taken and HR in a group of 1000 athletes depends on the type of data and the research question.

If the number of steps and HR are both measured on a continuous scale and the research question is to examine the strength and direction of the relationship between the two variables, then the appropriate test would be Pearson's correlation coefficient.

If either the number of steps or HR is measured on a continuous scale and the other variable is measured on an ordinal scale, then the appropriate test would be Spearman's correlation coefficient.

However, if the research question is to predict HR based on the number of steps taken, and there are other variables that may influence the relationship, then multiple regression analysis would be the appropriate test.

Chi-Square test is used to examine the association between two categorical variables. It is not appropriate for examining the relationship between a continuous and categorical variable.

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Reason:

There are 6 angles shown. If they are all the same measure, then they must be 360/6 = 60 degrees each. This is because the angles all glue together to form a full 360 degree rotation. There are no gaps or overlaps.

Check the picture below.

\(\textit{area of a segment of a circle}\\\\ A=\cfrac{r^2}{2}\left( ~~ \cfrac{\pi \theta }{180}-\sin(\theta ) ~~ \right) \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ r=8\\ \theta =60 \end{cases} \\\\\\ A=\cfrac{8^2}{2}\left( ~~ \cfrac{\pi (60) }{180}-\sin(60^o ) ~~ \right)\implies A=32\left( ~~ \cfrac{\pi }{3}-\sin(60^o ) ~~ \right) \\\\\\ A=32\left( ~~ \cfrac{\pi }{3}-\cfrac{\sqrt{3}}{2} ~~ \right)\implies A=\cfrac{32\pi }{3}-16\sqrt{3}\implies A\approx 5.8~in^2\)

Given:

The graph passes through the given points (4,-2) and (2,0).

To find:

The quadratic function \(y=a(x-h)^2\).

Solution:

We have, quadratic function

\(y=a(x-h)^2\)            ...(i)

The graph passes through the given points (4,-2) and (2,0). It means the equation must be true for these points.

Putting x=4 and y=-2 in (i), we get

\(-2=a(4-h)^2\)         ...(ii)

Putting x=2 and y=0 in (i), we get

\(0=a(2-h)^2\)          ...(iii)

Divide (iii) by (ii).

\(\dfrac{0}{-2}=\dfrac{a(2-h)^2}{a(4-h)^2}\)

\(0=\dfrac{(2-h)^2}{(4-h)^2}\)

\(0=(2-h)^2\)

\(0=2-h\)

\(h=2\)

Putting h=2 in (ii), we get

\(-2=a(4-2)^2\)

\(-2=a(2)^2\)

\(-2=a(4)\)

Divide both sides by 4.

\(\dfrac{-2}{4}=a\)

\(\dfrac{-1}{2}=a\)

Putting \(a=-\dfrac{1}{2}\) and h=2 in (i), we get

\(y=-\dfrac{1}{2}(x-2)^2\)

Therefore, the required quadratic function is \(y=-\dfrac{1}{2}(x-2)^2\).

() = Fraction

Answer:

1. x= −(3 /5 y)+ (23 /5)

2. x=−2y+6

Step-by-step explanation:

Let's solve for x.

5x+3y=23

Step 1: Add -3y to both sides.

5x+3y+−3y=23+−3y

5x=−3y+23

Step 2: Divide both sides by 5.

5x /5 = −((3y+23) /5)

x= −(3 /5 y)+ (23 /5)

------------------------------------------------

Let's solve for x.

2x+4y=12

Step 1: Add -4y to both sides.

2x+4y+−4y=12+−4y

2x=−4y+12

Step 2: Divide both sides by 2.

(2x /2 )= −((4y+12) /2)

x=−2y+6

Hope it helped!

Answer:

the answer is B.FALSE

Step-by-step explanation:

hope it helps

Answer:

a=  

⇒ 3.5

b=  

⇒ 1.5

c=  

⇒ -1.5

d=  

⇒ 6.5

e=  

⇒ 1.5 f=  

⇒ -2.5

g=  

⇒ -8.5

h=  

⇒ -2.5

i=  

⇒ 3.5

Step-by-step explanation:

The values of the a, b, c, d, e, f, g, h, and i can be calculated after finding the inverse of a matrix.

It is defined as the group of numerical data, functions, and complex numbers in a specific way such that the representation array looks like a square, rectangle shape.

We have a matrix A shown in the picture:

         | 2   3   3 |

A =    | 3    1   2 |

         | 7    8   9 |

It is required to find the inverses of a matrix.

To find the inverse of a matrix:

Augment with a 3x3 identity matrix

\(=\begin{bmatrix}2&3&3&\mid \:&1&0&0\\ 3&1&2&\mid \:&0&1&0\\ 7&8&9&\mid \:&0&0&1\end{bmatrix}\)

Convert the matrix to the identity matrix.

\(=\begin{bmatrix}1&0&0&\mid \:&\frac{7}{2}&\frac{3}{2}&-\frac{3}{2}\\ 0&1&0&\mid \:&\frac{13}{2}&\frac{3}{2}&-\frac{5}{2}\\ 0&0&1&\mid \:&-\frac{17}{2}&-\frac{5}{2}&\frac{7}{2}\end{bmatrix}\)

Simply it:

\(=\begin{pmatrix}\dfrac{7}{2}&\dfrac{3}{2}&-\dfrac{3}{2}\\ \dfrac{13}{2}&\dfrac{3}{2}&-\dfrac{5}{2}\\ -\dfrac{17}{2}&-\dfrac{5}{2}&\dfrac{7}{2}\end{pmatrix}\)

From the inverse matrix the values of unknows can be find:

a = 7/2

b = 3/2

c = -3/2

d = 13/2

e = 3/2

f = -5/2

g = -17/2

h = -5/2

i = 7/2

Thus, the values of the a, b, c, d, e, f, g, h, and i can be calculated after finding the inverse of a matrix.

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Answer:

x = x amount of chips in 1 bag

x about of chips in 1 bag times the 4 bags = x amount of chips in all 4 bags

Answer:

y=1/5x+7

Step-by-step explanation:

Answer:

Step-by-step explanation: A positive exponent tells us how many times to multiply a base number, and a negative exponent tells us how many times to divide a base number. We can rewrite negative exponents like x⁻ⁿ as 1 / xⁿ.

The correct answer is d. None of these choices represents a continuous uniform random variable.

A continuous uniform random variable is characterized by a continuous probability distribution over a specific range with a constant probability density. Let's analyze each option to determine whether it represents a continuous uniform random variable.

a. The function f(x) = 1/2 for x between 1 and 1, inclusive: This is not a valid probability density function since it assigns a non-zero probability only to a single point (x = 1). A continuous uniform random variable should have a constant probability density over an interval, not just at a single point.

b. The function f(x) = 10 for x between 0 and 1/10, inclusive: This is also not a valid probability density function because it assigns a probability density of 10 over the interval [0, 1/10]. The probability density function for a continuous uniform random variable should be constant, but here it is not.

c. The function f(x) = 1/3 for x = 4, 5, 6: This represents a discrete probability distribution rather than a continuous one. A continuous uniform random variable should have a continuous range of possible values, not just a few specific points.

Therefore, none of the given choices represents a continuous uniform random variable. Option d is the correct answer.

In summary, for a random variable to be considered a continuous uniform random variable, its probability density function should have a constant value over a continuous range of values, rather than at specific points or intervals.

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Answer:

I don't think you can so keep the number 8653 under the radical :)

Answer:

you cant do it so keep the number 8653

Step-by-step explanation:

Answer:

56

Step-by-step explanation:

Take 64 and subtract by 8, to get 56

Answer:

I believe it's y=4x+8

Step-by-step explanation:

if it's wrong I'm sorry

Answer:

B

Step-by-step explanation:

Just put it in Desmos graphing calculator and you'll see that other than D option B is the only one that passes through the point. You know it's not Option D Because it has a negative slope which will always cross with a positive one.

Answer:

bellow the

Step-by-step explanation:

Answer: the hight of the plant is the dependent variable bc the independent variable is music being played

hoped this helped (let me know if it did) :)

Plants growing taller is the independent variable.

Suppose we have an expression f(x) = 4x + 3 the value of x defines the value of f(x) here x is the independent variable and f(x) is dependent variable.

According to the given question

Playing music makes plants grow taller but plant getting taller can not play music here music is the independent variable because it is the cause that making a plant grow tall and the plant getting taller is dependent variable because it is dependent on if the music is playing or not.

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Answer:

52,5

Step-by-step explanation:

50+55=105

105:2=52,5

Average speed of the entire trip is 52.5 km/hr

Given that;

Speed of car during the way = 50 km/hr

Speed of car in return = 55 km/hr

Find:

Average speed of the entire trip

Computation:

Average speed of the entire trip = Sum of speed / 2

Average speed of the entire trip = [50 + 55] / 2

Average speed of the entire trip = 105 / 2

Average speed of the entire trip = 52.5 km/hr

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The complete text would be the following:

Parallel lines have the same slope, but different y-intercepts.

Perpendicular lines have opposite reciprocal slopes, which means the product of their slopes is -1.

Answer:12 and 15

Step-by-step explanation:

Answer:

Company B is the better deal. Diego will save $31.5.

Step-by-step explanation:

First, find the area of the rectangle: 45*30=1350 sq.ft.

Next, find out how much it will cost for Company A: $3.9 for 2 x 5 ft (10 sq.ft)

Divide 1350 by 10 to see how many of their sod rolls will fit into his yard=135.

Multiply $3.9 by 135=526.5$

Do the same with Company B: $150 for 450 sq.ft plus $45 delivery.

Dived 1350 by 450 to see how many rolls= 3

Multiply $150 by 3= $450, then add $45= $495

Subtract Company B's $495 from Company A's $526.5= $31.5 <-how much Diego saved.

Diego will save $31.50 by choosing Company B instead of Company A.

For business A:

The yard's entire square footage is calculated as,

⇒ 30 x 45

⇒ 1,350 square feet

The total area covered by each roll of sod must then be determined in square feet is calculated as,

⇒ 2 x 5

⇒ 10 square feet per roll

The total quantity of sod rolls required is calculated as,

⇒ 1,350 / 10

⇒ 135

The price of each roll of sod is $3.90, making the total price of the sod calculated as,

⇒ 135 x $3.90

⇒ $526.5

For business B:

The garden is still 1350 square feet in size overall. Pallets have a surface area of 450 square feet each, thus a total of:

⇒ 1,350 / 450

⇒ 3

The price of the sod is $150.00 per pallet, making the total price calculated as,

⇒ 3 x $150

⇒ $450

In addition, there is a $45.00 one-time shipping fee. Therefore, Company B's overall cost is calculated as,

⇒ $450.00 + $45.00

⇒ $495.00

We can see by comparing the two options that Company B is the better value because it is less expensive than Company A. Diego will save:

⇒ $526.50 - $495.00

⇒ $31.50.

Diego will save $31.50 by choosing Company B instead of Company A.

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Answer:

7a - 21 + 28b

Step-by-step explanation:

using the distributive property we can multiply 7 to the numbers in the paretheses. doing this we get:

7a - 21 + 28b

Answer:

Tan p is 20/21

Tan q is 21/20

Step-by-step explanation:

Tan is short for tangeant.

tangeant means opposite/adjacent

the opposite of vertices p is 20.

the adjacent of vertices p is 21.

so tan p= 20/21

The opposite of vertices q is 21

the adjacent of vertices q is 20

so tan q is 21/20

Once you have the distance covered in the first 6.5 hours, you can divide it by 6.5 to calculate your average speed during that time interval.

To estimate your speed at 6.5 hours into the trip, you would need to know the distance covered during that time interval. The speed is calculated by dividing the distance traveled by the time taken.

To make an accurate estimate, you would need the following information:

Distance covered: You would need to know how far you have traveled in the first 6.5 hours of the trip. This could be obtained from a GPS device, odometer, or by referencing a map.

Time taken: You already know that it has been 6.5 hours into the trip.

Consistency of speed: It is assumed that your speed has remained relatively constant throughout the trip. If there were significant variations in speed, the estimate would be less accurate.

This estimate assumes that your speed has been consistent, without any major fluctuations. Keep in mind that this estimate represents your average speed over the given time period, and your actual speed at any specific moment during the trip could have been different.

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The marginof error is given by the formula: `margin of error = z* (σ/√n)`, where `z` is the z-value for the desired confidence level`σ` is the standard deviation of the population, and `n` is the sample size.

So the margin of error for a 99% confidence interval estimate is `2.576*(σ/√n)`.Margin of error is defined as the amount of error that can be expected in a statistical estimate, due to the fact that it is based on a sample of data rather than the entire population. In other words, it is the range of values above and below the sample statistic that is likely to include the true population parameter at the desired level of confidence. Margin of error is typically expressed as a percentage or a number, depending on the context. For example, a margin of error of 3% for a political poll means that the results of the poll are within 3 percentage points of the true population value, 99% of the time.Therefore the margin of error for a 99% confidence interval estimate is `2.576*(σ/√n)`. Note that this assumes that the population is normally distributed or that the sample size is large enough to apply the central limit theorem. It is important to also consider factors such as sampling bias, measurement error, and other sources of uncertainty when interpreting the results of a statistical estimate.

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The quadratic equation of x2-6x+9=0 is C) (x-2)(x+3).

Equation is a physical and mathematical statement that describing physical phenomena and the relationship between different physical quantity typically consist of variable simple presenting physical quantity and then it personal variable may be pointed such as your energy.

This equation is an example of a quadratic equation, which is an equation of the form ax2+bx+c=0, where a, b, and c are real numbers, and a is not equal to 0. In this equation, a is equal to 1, b is equal to -6, and c is equal to 9. To solve this equation, we need to use the quadratic formula, which states that the solutions to the equation are x= -b ± √b2-4ac / 2a. Therefore, the solutions to this equation are x= -(-6) ± √(-6)2-4(1)(9) / 2(1), which simplifies to x=3 ± √3 /2, or x=3 ± √9 /2. This simplifies to x=3 ± √3, or x=3 ± 1. Therefore, the solutions to this equation are x=2 and x=4. The factored form of this equation is (x-2)(x+3), which is option C.

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