according to a recent pew research center report, many american adults have made money by selling something online. in a random sample of 4579 american adults, 914 reported that they earned money by selling something online in the previous year. assume the conditions for inference are met. construct a 98% confidence interval for the proportion of all american adults who would report having earned money by selling something online in the previous year.

The treatments (new menu item) were not randomly assigned to the students when 36 local middle school kids were chosen at random to take part.

Given that,

36 local middle school kids were chosen at random to take part in a taste test to choose a new menu item for a cafeteria. The Cajun potato barrels or the macaroni and cheese were the options offered to each pupil. 20 pupils chose the macaroni and cheese from the sampling, while 16 selected the Cajun potato barrels. On a scale from 1 (very dislike) to 9 (very much like), each student was asked to rank the object they selected (extremely like).

We have to find which of the following keeps this study from being an experiment with a sound design.

Each student was given the option of choosing either the macaroni and cheese or the Cajun potato barrels. Because the students' treatments were not distributed at random, those who preferred their cuisine chose it and gave it high marks. As a result, the study has selection bias.

Therefore, The treatments (new menu item) were not randomly assigned to the students when 36 local middle school kids were chosen at random to take part.

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The addition property of equality states that if two values are equal to a third value, then they are also equal to each other. In this case, 4 is equal to 5+2, so 4 must also be equal to 2+5. However, Mark wrote the equation incorrectly, so the correct statement would be 4 = 5 + 2.

The addition property of equality is a key concept in mathematics, and it is important to understand and use it correctly. In this case, 4 is equal to 5+2, so the correct statement would be 4 = 5 + 2. This is because the addition property of equality states that if two values are equal to a third value, then they are also equal to each other. Therefore, Mark's statement of 4 = 2 + 5 was incorrect, and the correct statement was 4 = 5 + 2. Understanding and applying the addition property of equality is essential for success in math.

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63:

2x3=6

3x5=15

6+15=21

x 3 =…

63

Step-by-step explanation:

well, let's get Amy's expenses and income to see how much is leftover, hmmm let's recall she's going to be a Resident living off campus, so her total costs will pretty much be the Total Costs of a Resident, now since this is for 9 months, whatever is leftover, we'll have to divide it by 9, Check the picture below.

Solving the equation x^2 + (y- 5)^2 = 30 for isolating x^2 is x^2 = - y^2 + 10y + 5. (Option D)

Equation is a mathematical statement that expresses values of two mathematical expressions as equal and is indicated by the sign =.

In order to isolate x^2 in the equation x^2 + (y- 5)^2 = 30, the remaining terms must be solved and simplified and collected on the other side.

Given equation is:

x^2 + (y- 5)^2 = 30

Expanding the (y- 5)^2 using formula for square of the difference between the two terms.

In general form: (a – b)^2 = a^2 – 2ab + b^2

Hence,

(y- 5)^2 = y^2 – 2(y)(5) + 5^2 = y^2 – 10y + 25

The original equation becomes,

x^2 + y^2 – 10y + 25 = 30

Subtract y^2 – 10y + 25 from both sides and simplifying:

x^2 + y^2 – 10y + 25 – (y^2 – 10y + 25) = 30 – (y^2 – 10y + 25)

x^2 = 30 – y^2 + 10y - 25

x^2 = - y^2 + 10y + 5

Note: The question is incomplete as it is missing options which are A. x^2 = y^2 + 10y+5 B. x^2 =-y^2 + 10y+25 C. x^2 = 30 - y^2 D. x^2 = - y^2 + 10y+5

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Answer:

  (d)  P ≥ -40

Step-by-step explanation:

You want the solution to P/8 ≥ -5.

Multiply both sides of the inequality by 8.

  8(P/8) ≥ 8(-5)

  P ≥ -40

The correct answer is option is a) x4 – 6x2 – 27 = 0 , d) 6(2x + 4)2 = (2x + 4) + 2 ,  e) 6x4 = -x2 + 5. as they are quadratic equations.

A quadratic equation is a second-order polynomial equation in one variable using the formula x = ax2 + bx + c = 0 and a 0. The fundamental theorem of algebra ensures that it has at least one solution because it is a second-order polynomial problem. The answer could be straightforward or difficult.

A quadratic function has the formula f(x) = ax2 + bx + c, with a, b, and c being integers and a not equal to zero. A parabola is a curve that represents the graph of a quadratic function. Parabolas can have openings that are upward or downward, different "widths" or "steepnesses," but they all share the same fundamental "U" form.

Due to the absence of an x2 component, bx 6 = 0 is NOT a quadratic equation. Because there is an x3 term, x3 x2 5 = 0 is NOT a quadratic equation (not allowed in quadratic equations).

The correct answer is option is a) x4 – 6x2 – 27 = 0 , d) 6(2x + 4)2 = (2x + 4) + 2 ,  e) 6x4 = -x2 + 5.

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Answer:

  See attached

Step-by-step explanation:

You want the graphed figure dilated by different scale factors around different center points.

To find the image of a dilated point, figure how far it is from the center of dilation, then multiply that distance by the scale factor. Plot the image point at that distance from the center of dilation in the same direction as the original point.

Dilation by a factor of 1/2 cuts all the distances in half. 2 grid squares become 1; 4 grid squares become 2.

Dilation by a factor of 2 multiplies all the distances by 2. 2 grid squares become 4; 4 grid squares become 8.

In the attached graph, the points are labeled with subscripts a, b, c according to the dilation they correspond to. Note that the center of dilation doesn't move, so Q and Q_a are the same point, and S and S_c are the same point.

After solving the given expression using exponents properties, the resultant answer is h²⁴.

Exponentiation is a mathematical process that involves the base b and the exponent or power n.

It is represented as bⁿ and is pronounced as "b to the n."

Positive, negative, zero, and rational exponents are the four different categories. Positive exponents indicate the number of times a base should be multiplied by itself.

So, we have:

(h¹²/h⁴)³

Now, solve as follows using properties:

(h¹²/h⁴)³

(h¹²)³/(h⁴)³

h³⁶/h¹²

h³⁶⁻¹²

h²⁴

Therefore, after solving the given expression using exponents properties, the resultant answer is h²⁴.

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Answer: The number line that you really want to move is the right side. Then, at that point, the right choice is C.

What is a number line?

A number line alludes to a straight line in science that has numbers organized at customary stretches or divides along its width. A number line is frequently shown on a level plane and can be delayed toward any path.

On the off chance that you are at - 15 on the number line and you needed to push toward the positive numbers

The number line that you need to move in the right side. Then the correct option is C.

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Step-by-step explanation:

The number of ways that Brad can pick groups of four is 715 ways.

Combinations are also referred to as selections. Combinations implies the selection of things from a given set of things. In this case, we intend to select the objects.

Combination formula is given as:

= n! / ((n – r)! r!)

n = the number of items.

r = how many items are taken at a time.

Based on the information, Brad has a list of thirteen such people and would like to propose some documentaries about four of them. This will be:

n! / ((n – r)! r!)

= 13! / (13 - 4)!4!

= 13! / 9!4!

= 13 × 12 × 11 × 10 / 4 × 3 × 2

= 715

There'll be 715 ways.

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The dimensions of the rectangle of maximum area are the length of 12√3 units and width of 4 units

Given that the ellipse has the equation: x²/144 + y²/16 = 1

Make x the subject:

x²/144 + y²/16 = 1

(x²+9y²)/144 = 1

x² + 9y² =144

x² = 144-9y²

x = √(144-9y²)

The  rectangle vertices is at (x,y), (-x,y), (x,-y), (-x,-y). Thus, the rectangle has a length and width of 2x and 2y respectively

The area of a rectangle inscribed inside an ellipse is given by:

Area (A) = 4xy

A = 4(√(144-9y²))y

A = 4y√(144-9y²)

A = 4√(144y²-9y⁴)

The maximum area of the rectangle is at dA/dy = 0  

dA/dy = 4[144-18³y/ (√(144y²-9y⁴))]

4[144-18y³/ (√(144y²-9y⁴))] = 0

144-18y³= 0

18y³ = 144

y³ = 144/18

y³ = 8

y = ∛8

y = 2

x = √(144-9y²)

x = √(144 - 9(2)²)

x = √108

x = 6√3

Thus, the dimensions are the length = 2x = 2×(6√3) = 12√3 units, the width = 2y = 2×2 = 4 units

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Answer:

13/15×13/14

Step-by-step explanation:

13/15 are not independents and then 12/14 aren't independants

Hence, [tex]x=16[/tex] when [tex]y=48[/tex].

What is the direct variation?

A direct variation, also called direct proportion is a relationship between two variables [tex]x[/tex] and [tex]y[/tex] that can be written as [tex]y = kx[/tex], [tex]k\neq 0[/tex].

Here given that,

The direct variation and [tex]y=75[/tex] when [tex]x=25[/tex],

As we know that,

[tex]y[/tex]α[tex]x[/tex]

[tex]y=kx[/tex]

[tex]75=k(25)\\\\k=\frac{75}{25}\\\\k=3[/tex]

So, when [tex]y=48[/tex]

[tex]y=kx\\\\48=3x\\\\x=\frac{48}{3}\\\\x=16[/tex]

Hence, [tex]x=16[/tex] when [tex]y=48[/tex].

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In image.

In the Image is the anser and explanation.

1. The offer price of the 800 shares of a mutual fund with a NAV of $14.10 that Bill Roundy bought is $11,280.

2. For this investment, Bill paid $11,618.40, including the load charge of 3%.

A load charge is a sales commission that investors pay when they buy (front-end load) or redeem (back-end load) shares in a mutual fund.

NAV means net asset value.

NAV refers to the difference between the investee company's total assets and its total liabilities.

The total number of mutual fund shares bought by Bill = 800

The net asset value of the shares = $14.10

Load charge = 3%

Offer price = $11,280 (800 x $14.10)

Amount Bill paid for the investment = $11,618.40 ($11,280 x 1.03)

Thus, with an offer price of $11,280 for the mutual fund, Bill Roundy paid a total of $11,618.40, including the load charge.

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Answer:

.35

Step-by-step explanation:

Just drop the zero     .350 is    350 thousandths  = 35 hundredths

The expression P(A + B) = P(A) + P(B) - P(AB) is proved.

Proved is shown below.

A set is a collection of items where there are operations such as:

Union of sets, the intersection of sets, complements of sets.

We have,

Consider A = {1, 2, 3, 4, 5}

B = {2, 3, 4, 6, 7}

P (A + B) = P (A U B)

P (AB) = P (A ∩ B) (Common values}

P (AB) = {2, 3, 4}

P (A + B ) = {1, 2, 3, 4, 5, 6, 7}

Now,

P(A + B) = P(A) + P(B) - P(AB)

{1, 2, 3, 4, 5, 6, 7} = {1, 2, 3, 4, 5} + {2, 3, 4, 6, 7} - {2, 3, 4}

{1, 2, 3, 4, 5, 6, 7} = {1, 2, 2, 3, 3, 4, 4,5, 6, 7} - {2, 3, 4}

{1, 2, 3, 4, 5, 6, 7} = {1, 2, 3, 4, 5, 6, 7}

Thus,

P{A + B) = P(A) + P(B) - P(AB) proved.

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This z-score tells you x = 34 is 2.75 standard deviations to the right of mean. And the mean is 23.

What is standard deviation?

The standard deviation is a statistic that expresses how much variation or dispersion there is in a set of values. While a high standard deviation suggests that the values are dispersed over a wider range, a low standard deviation suggests that the values tend to be close to the set mean.

Given:

Annie averages 23 points per basketball game with a standard deviation of 4 points.

Suppose Annie's points per basketball game are normally distributed.

Let X = the number of points per basketball game.

By Notation,

X ~ N(23,4) means E(X) = 23, SD(X) = 4

Mean = 23 , Standard deviation = 4

So,

[tex]Z_s_c_o_r_e = \frac{Value - Mean}{Sd}\\Z_s_c_o_r_e = \frac{34-23}{4}\\ = \frac{11}{4} Z_s_c_o_r_e = 2.75[/tex]

mean = 23

This z-score tells you x = 34 is 2.75 standard deviations to the right of mean.

Hence, this z-score tells you x = 34 is 2.75 standard deviations to the right of mean. And the mean is 23.

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If the mean is 8.5 minutes and the variance is 9 minutes then the upper confidence limit is 9.3765  .

In the question ,

it is given that ,

the number of sales person in the random sample (n) = 45 ,

the mean = 8.5 minutes

the variance is = 9 minutes .

So , the standard deviation is = 3.

For the 95% confidence interval the level of significance (α) is 0.05 .

So , α/2 = 0.05/2 = 0.025 .

So , from Z table ;

the value of [tex]Z_{\frac{\alpha }{2} }[/tex] is = 1.96 .

The formula for the confidence interval is

= [ mean ±  [tex]Z_{\frac{\alpha }{2} }[/tex](SD/√n)]

Substituting the values from above ,

we get ,

= [8.5 - 1.96*0.4472 , 8.5 + 1.96*0.4472]

Simplifying further ,

we get ,

= [ 7.6235 , 9.3765 ]

Therefore , the upper limit of the 95% confidence interval is 9.3765  .

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Whole numbers range in size from 0 to infinity.

The collection of rational numbers is p/q, q ≠0.

Integers have no decimal portion and range from -infinity to infinity.

Given that,

We have to finding whole numbers, integers, and rational numbers is necessary.

the collection of whole numbers and their opposites,

The group of numbers that can be expressed as fractions is called ______.

The group of counting numbers and zero is known as ______.

We know that,

All of the numbers that are there can be defined or represented using a number system.

Complex numbers (a + ib)

Imaginary numbers

(0 + ib)

Real numbers                                                                

(a + i0)                                                                            

Rational numbers              

(perfect squares)      

Irrational numbers      

(non-perfects squares)

Fractions.  

(p/q, q ≠ 0)          

Integers

Negative integers is - ∞ to - 1

Positive integers is 1 to ∞

whole numbers is 0 to ∞

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If John invests $200 into an account with a 2.7% interest rate that is compounded semiannually, after 10 years he will have a future value of $261.52.

The future value is the compounded present value at an interest rate into the future.

The future value can be worked out using the FV table or formula.  We can also use an online finance calculator to find the future value of present-day investment.

N (# of periods) = 20 semiannual periods (10 years x 2)

I/Y (Interest per year) = 2.7%

PV (Present Value) = $200

PMT (Periodic Payment) = $0

Results:

Future Value (FV) = $261.52

Total Interest = $61.52

Thus, if John invests the present value of $200 into the account, after 10 years, his investment would become $261.52.

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Answer: She could make those two changes to save money for her trip. Also, she could save a little bit of her salary to have enough money to go.

Step-by-step explanation:

This is just a guess but PLEASE GIVE ME BRAINLIEST if you're pleased with my answer.

If x and y have a common prime factor then y and x also have a common prime factor,so x and y are symmetric.

If x-y is divisible by 3 then y-x is also divisible by 3.so it is symmetric and x-y is reflexive as x ∈Z+ ,x-y is a multiple of 3.so it is reflexive.

If x,y and y,z are primes then x,z are also primes.So it is transitive and it is also symmetric If x,y are primes then y,x are also primes.

x and y are symmetric since (a,b)∈ R⇒ a,b are prime and their difference is 2⇒(b,a)∈ R

Step-by-step explanation:

Part a:  x and y have a common prime factor

If x and y have a common prime factor then y and x also have a common prime factor, so x and y are symmetric.

Reflexive: x and y are not reflexive since {1,1}∉ R(1 has no prime factor)

Symmetric: If x and y have a common prime factor then y and x also have a common prime factor , so x and y are symmetric.

Irreflexive: refer point A(above)

Transitive: x and y are not transitive since {2,9}∉ R(has no common prime factor)

Anti symmetric: x and y are not anti symmetric [Refer point B(above)]

If x and y have a common prime factor then y and x also have a common prime factor, so x and y are symmetric.

b) x - y is a multiple of 3

If x-y is divisible by 3 then y-x is also divisible by 3.so it is symmetric and x-y is reflexive as x ∈Z+ ,x-y is a multiple of 3.so it is reflexive.

Symmetric: If x-y is divisible by 3 then y-x is also divisible by 3.so it is symmetric.

Antisymmetric x-y is not anti symmetric (refer above)

Irreflexive refer point D

Reflexive : x-y is reflexive as x ∈Z+ ,x-y is a multiple of 3.

Transitive: if x-y,y-z is multiples of 3 then x-z is also multiples of 3.so it is also transitive.

(c) x and y are both prime

If x,y and y,z are primes then x,z are also primes.So it is transitive and it is also symmetric If x,y are primes then y,x are also primes.

Transitive: If x,y and y,z are primes then x,z are also primes.So it is transitive.

irreflexive Refer It is not reflexive since {4,4}∉ R(4 is not a prime)

Symmetric:  If x,y are primes then y,x are also primes.So it is symmetric..

Reflexive:It is not reflexive since {4,4}∉ R(4 is not a prime)

Antisymmetric: Refer point C

(d) x and y are twin primes (they are primes and their distance is 2)

x and y are symmetric since (a,b)∈ R⇒ a,b are prime and their difference is 2⇒(b,a)∈ R

Symmetric: x and y are symmetric since (a,b)∈ R⇒ a,b are prime and their difference is 2⇒(b,a)∈ R

Irreflexive Refer point D

Antisymmetric Refer point A

Reflexive:  It is not reflexive since {4,4}∉ R

Transitive: It is not transitive because (3,5)∈R and (5,3)∈R but (3,7)∉ R

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Parallel lines are straight lines that never meet each other no matter how long we extend them

Parallel lines are any two or more lines that all lie in the same plane and never cross one another. They are equally spaced apart and have the same incline.

Numerous pairs of angles are created when a transversal line intersects any two parallel lines. While some angles are additional, others are congruent (equal).

The fundamental characteristics listed below make it simple to recognise parallel lines.

Parallel lines are defined as straight lines that are always the same distance apart.

No matter how far apart they are from one another, parallel lines can never intersect.

I've answered in general as the question is incomplete

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Answer:

4 yellow tulips and 8 white lilies.

Step-by-step explanation:

Ratio is 1:2:3 for yellow tulips, white lilies and the total.

Set up a proportion

[tex]\frac{yellow}{total}[/tex] = [tex]\frac{yellow}{total}[/tex]  Three of these numbers you know, Solve for the unknown

[tex]\frac{1}{3}[/tex] = [tex]\frac{x}{12}[/tex]  Cross multiply and solve for x

3x = 12  Divide both sides by 3

x = 4  This is the number of yellow tulips

Set up another proportion:

[tex]\frac{white lilies}{total}[/tex] = [tex]\frac{white lilies}{todal}[/tex]

[tex]\frac{2}{3}[/tex] = [tex]\frac{x}{12}[/tex]  I can see that 3 x 4 = 12 so I will multiply the top number to 2 by 4 to get 8.

From the given information, we can that y = [tex]sin^{-1}x[/tex] function is represented in the graph.

The opposite of the sine function is the inverse sine function, commonly referred to as the arcsine function. Since the sine (or sine function) of an angle is equal to the ratio of the opposite side to the hypotenuse, the sine inverse of that ratio will provide the angle's measurement.

According to graph

Domain is [-1, 1]

Range = [tex][-\frac{\pi }{2} ,\frac{\pi }{2} ][/tex]

Set an interval to limit [tex][-\frac{\pi }{2} ,\frac{\pi }{2} ][/tex] the sine-scope function's so that it is one to one and not unlimited.

The limited function is one to one since it satisfies the horizontal line test.

[tex]Each range value (-1 to 1) is within the limited domain (-\frac{\pi }{2} \frac{\pi }{2})[/tex]

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Answer: 13 27 to 15 27 = 2 hours

15 27 to 16 00 = 33 mins

1600 to 16 12 = 12 mins

Total = 2hours + 33 mins + 12 mins = 2 hours 45 mins = 2.75 hours

Distance = Speed x time = 56 x 2.75 = 154 km

Answer: 154 km

Step-by-step explanation: