Como resolver ecuaciones que tienen diferentes incógnitas
Ej: -x-4z=-15

There are 72 ways for people to sit around a round table if Pierre and Thomas want to sit together, but Rosa doesn't want to sit next to either of them.

First, we can seat Pierre and Thomas next to each other as a block. There are 2 ways to arrange them (PT or TP).

Next, we can seat Rosa in one of the 6 available seats that are not next to the block. There are 6 ways to do this.

Then, we can seat the remaining 4 people in the 4 available seats. There are 4! ways to do this.

Finally, we need to account for the fact that rotations are not distinct but reflections are distinct. Since there are 8 people seated around the table, there are 8 possible rotations. However, if we reflect the table (i.e., flip it over), we get a different seating arrangement. Therefore, there are 16 distinct arrangements.

Putting it all together, we have:

2 (arrangements for Pierre and Thomas) x 6 (arrangements for Rosa) x 4! (arrangements for the remaining 4 people) x 16 (accounting for distinct reflections) = 72

Therefore, there are 72 ways for people to sit around a round table if Pierre and Thomas want to sit together, but Rosa doesn't want to sit next to either of them.

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The probability of selecting a person from a population that has a birthday today and another person who has a birthday in April is 1/4380.

What is probability ?

Probability is the branch of mathematics that deals with the study of random events or experiments. It is a measure of the likelihood of an event or outcome occurring. The probability of an event is a number between 0 and 1, where 0 indicates that the event is impossible and 1 indicates that the event is certain to occur. The probability of an event can be calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

According to the question:
To find the probability of selecting a person with a birthday today and another person with a birthday in April, we need to calculate the probability of each event separately and then multiply them together.

Let P(T) be the probability of selecting a person with a birthday today and P(A) be the probability of selecting a person with a birthday in April.

Assuming that there are 365 days in a year and that all birthdays are equally likely to occur, we have:

P(T) = 1/365 (the probability of selecting a person with a birthday today)

P(A) = 1/12 (the probability of selecting a person with a birthday in April)

To find the probability of both events happening together, we multiply the probabilities:

P(T and A) = P(T) x P(A) = (1/365) x (1/12) = 1/4380

Therefore, the probability of selecting a person from a population that has a birthday today and another person who has a birthday in April is 1/4380.

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The best measure of central tendency for this data is the mode, which is the most frequently occurring value in a dataset.

In this case, the grilled ribeye is the most popular selling dinner item with 2,021 portions sold, making it the mode of the data. While the mean and median are also measures of central tendency, they may not be as appropriate for this data since the counts for the grilled ribeye are much higher than the other two items.

Using the mean would give too much weight to the grilled ribeye, and using the median would not accurately represent the most popular item. Therefore, the mode is the best choice for this data.

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Answer:

[tex]\textsf{The value of t is 14m. }[/tex]

Step-by-step explanation:

To find:-

Answer:-

F I G U R E : -

[tex]\setlength{\unitlength}{1 cm}\begin{picture}(0,0)\thicklines\qbezier(1,1)(1,1)(6,1)\put(0.4,0.5){\bf D}\qbezier(1,1)(1,1)(1.6,4)\put(6.2,0.5){\bf C}\qbezier(1.6,4)(1.6,4)(6.6,4)\put(1,4){\bf A}\qbezier(6,1)(6,1)(6.6,4)\put(6.9,3.8){\bf B}\multiput(3,.5)(0,4){2}{$\sf 13m $}\multiput(1,2.5)(5.5,0){2}{$\sf t $}\put(5,-2){$\boxed{\bf{-\ By }\ \bf " Tony Stark"}$}\end{picture}[/tex]

As we know that the perimeter of a parallelogram is the sum of all the side lengths of it . Also we know that the opposite sides are equal in a parallelogram. Therefore, here the two other sides AD and DC would be "t" and "13m" respectively.

Now also we are given that the perimeter of the parallelogram is 54m . So we can create a equation to find out "t" as ,

[tex]:\sf\implies Perimeter = 13m + t + 13c

m + t\\[/tex]

Since the perimeter is 54m , therefore;

[tex]:\sf\implies 54m = 26m + 2t \\[/tex]

Subtract 26m on both the sides,

[tex]:\sf\implies 54m - 26m = 2t\\[/tex]

Simplify,

[tex]:\sf\implies 28m = 2t \\[/tex]

Divide both the sides by "2" ,

[tex]:\sf\implies t = \dfrac{28m}{2} \\[/tex]

Simplify,

[tex]:\sf\implies \pink{ t = 14m } \\[/tex]

Hence the value of t is 14m .

Answer:

A) To find the terms of the geometric sequence, we use the formula:

a_n = a_1 * r^(n-1)

where a_n is the nth term of the sequence, a_1 is the first term, r is the common ratio, and n is the position of the term in the sequence.

Given that a_1 = 640 and r = 1/2, we can find the first 6 terms of the sequence:

a_1 = 640

a_2 = a_1 * r = 640 * (1/2) = 320

a_3 = a_2 * r = 320 * (1/2) = 160

a_4 = a_3 * r = 160 * (1/2) = 80

a_5 = a_4 * r = 80 * (1/2) = 40

a_6 = a_5 * r = 40 * (1/2) = 20

So the first 6 terms of the sequence are: 640, 320, 160, 80, 40, 20.

B) To write the terms of the sequence as a series, we simply add the terms together:

640 + 320 + 160 + 80 + 40 + 20 + ...

The series has an infinite number of terms.

C) Here is a graph of the geometric sequence:

   |

640|                    o

   |                o

320|            o

   |        o

160|    o

   |o

  0|___________________

    1   2   3   4   5   6

The horizontal axis represents the position of the term in the sequence (n), and the vertical axis represents the value of the term (a_n). Each dot on the graph represents a term in the sequence.

D) To find the partial sums of the series, we add up the terms up to a certain position in the sequence. For example, the first partial sum is simply the first term:

S_1 = 640

The second partial sum is the sum of the first two terms:

S_2 = 640 + 320 = 960

The third partial sum is the sum of the first three terms:

S_3 = 640 + 320 + 160 = 1120

Continuing this pattern, we can find the first 6 partial sums of the series:

S_1 = 640

S_2 = 960

S_3 = 1120

S_4 = 1200

S_5 = 1240

S_6 = 1260

The graphic at the end shows the graph of the absolute value function.

How is the function graphed?

The following is the function:

y=−2³√x−1+2

To graph this, we must first identify some points on the line, which requires evaluating the line in a variety of x values.

Replace the value 2 of x in f(x)=-8x-1+2

x is replaced with 2 f(2)=-8+2 f(2)=-6.

Evaluation in x = 3 results in:

y = -8√(3)-1+2

The vertex points (1,2), (2,-6), and (3,-9.31) can be used to graph the square root.

Once you have accumulated enough data points, you may plot them using absolute value functions to create the graph you see below in this case.

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The volume of the cone in terms of π is option (c) 100π in^3

The formula for the volume of a cone is given by:

V = (1/3)πr^2h

where r is the radius of the base of the cone, h is the height of the cone.

In this case, we are given that the radius of the cone is 5 in and the slant height is 13 in. We can use the Pythagorean theorem to find the height of the cone:

h^2 = y^2 - r^2

h^2 = 13^2 - 5^2

h^2 = 144

h = 12 in

Therefore, the volume of the cone is:

V = (1/3)πr^2h

V = (1/3)π(5^2)(12)

V = (1/3)π(25)(12)

V = (1/3)(300π)

V = 100π cubic inches

Therefore, the correct option is (c) 100π in^3

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Answer: 100π in3

Step-by-step explanation:

The mean and standard deviatiοn fοr the entire prοject can be calculated by adding the means and variances οf the paths: Prοject: mean = 15.33

Prοbability can be defined as ratiο οf number οf favοurable οutcοmes and tοtal number οutcοmes.

Tο cοnstruct the prοject netwοrk, we can use the activity-οn-nοde (AON) apprοach, where nοdes represent activities and edges represent the lοgical relatiοnships between activities.

Here, activity A represents repοrt generatiοn, activity B represents web scraping, and activity C represents testing. The numbers οn the edges indicate the time estimates (οptimistic, mοst prοbable, and pessimistic) fοr each activity. The immediate predecessοrs fοr activity B and activity C are shοwn by the vertical lines cοnnecting them tο the nοdes representing their predecessοrs.

Tο estimate the critical path, we need tο find the lοngest path thrοugh the netwοrk, which is the path that takes the mοst time tο cοmplete. In this case, the critical path is A-B-C, with a duratiοn οf 8+9+1=18 weeks.

(b) Tο estimate the prοbability that the prοject will be cοmplete within 11 weeks based sοlely οn the critical path, we can use the critical path methοd (CPM) and the nοrmal distributiοn. The mean duratiοn οf the critical path is (8+9+1)/3=6 weeks, and the standard deviatiοn is[tex][(8-2)/6+(9-2)/6+(1-2)/6]^0.5=1.15[/tex]  weeks.

The prοbability that the critical path will be cοmpleted within 11 weeks can be calculated using the standard nοrmal distributiοn as fοllοws:

P(Z <= (11-6)/1.15) = P(Z <= 4.35) = 1

Therefοre, the prοbability estimate is 1 οr 100%.

(c) Tο estimate the prοbability that the prοject will be cοmplete within 11 weeks using all paths thrοugh the prοject netwοrk, we can use the prοgram evaluatiοn and review technique (PERT) and the beta distributiοn. The mean duratiοn and standard deviatiοn fοr each activity can be calculated using the PERT fοrmula:

mean = (οptimistic + 4*mοst prοbable + pessimistic)/6

standard deviatiοn = (pessimistic - οptimistic)/6

The mean and standard deviatiοn fοr each activity are shοwn belοw:

Activity A: mean = (2+8+12)/6 = 7, stdev = (12-2)/6 = 1.67

Activity B: mean = (4+9+11)/6 = 8, stdev = (11-4)/6 = 0.83

Activity C: mean = (1+1+1)/6 = 0.33, stdev = (1-1)/6 = 0

Using the mean and standard deviatiοn fοr each activity, we can calculate the mean and standard deviatiοn fοr each path and fοr the entire prοject. The mean and standard deviatiοn fοr each path are shοwn belοw:

Path 1 (A-B-C): mean = 7+8+0.33 = 15.33, stdev [tex]= (1.67^2+0.83^2+0^2)^0.5 = 1.87[/tex]

Path 2 (A-C): mean = 7+0.33 = 7.33, stdev [tex]= (1.67^2+0^2)^0.5 = 1.67[/tex]

Therefοre, The mean and standard deviatiοn fοr the entire prοject can be calculated by adding the means and variances οf the paths: Prοject: mean = 15.33

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Answer:

28 the answer is 28 really it's 28

In the following question, among the conditions given, There are 26^4 x 10^5 possible license plates that can be issued using this condition.

Hence, This is because the license plates consist of 4 letters and 5 digits. There are 26 possible letters that can be used in the first four places, so the total possible combinations of 4 letters is 26^4. There are 10 possible digits that can be used in the last five places, so the total possible combinations of 5 digits is 10^5. Multiplying these two together gives the total number of possible license plates: 26^4 x 10^5.

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There are a total of $26^4 × 10^5$ possibilities, which simplifies to 26,000,000,000 (twenty-six billion) possibilities. Therefore, with this condition, twenty-six billion license plates can be issued.

A state's license plates consist of 4 letters followed by 5 digits.

How many possible license plates can be issued using this condition?

When designing a license plate, the condition provided in the question suggests that a license plate should consist of 4 letters followed by 5 digits.

Therefore, we can count the total number of license plates in two phases.

The number of choices for each segment must be taken into account separately for the letters and the numbers.

When considering the letter possibilities, there are 26 options for each position since there are 26 letters in the alphabet.

For the first 4 positions, there are a total of $26^4$ = 456,976 possibilities.

Similarly, for the last 5 positions,

there are 10 options for each position since there are 10 digits.

There are $10^5$ = 100,000 possibilities for the last 5 positions.

The entire plate's total number of combinations is obtained by multiplying these numbers.

There are a total of $26^4 × 10^5$ possibilities

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The correct length of the missing part of the triangle would be = 10. That is option A.

The length of the smaller triangle = 20

The width of the smaller triangle = 16

The length of the bigger triangle = 20+X

The width of the bigger triangle = 24

But for similar triangles = 16/24 = 20/20+X

16(20+X) = 20×24

320+ 16x = 480

16x = 480-320

16x = 160

X = 160/16

X = 10

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To visually display the trends in net profits over a period of four years, you should use a line chart

Explanation:

A line chart is a type of chart used to show information as a series of data points connected by straight line segments. A line chart is a basic type of chart that is often used in data analysis. It is also known as a line graph or a curve chart. This type of chart is commonly used to display trends in data over time.

                  In the given question, it has been asked to visually display the trends in net profits over a period of four years. To visually display the trends in net profits, a line chart is the best choice. Therefore, the correct answer is option C, a line chart.

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Answer:

£21

Step-by-step explanation:

We know

Three women earned a total of £36. They shared the £36 in a ratio of 7:3:2. Meaning for every £12, one receives £7, one receives £3, and one receives £2.

Donna receives the largest amount working out the amount Donna receives.​ Meaning Donna receives £7.

To get from 12 to 36, we time 3.

We take

7 x 3 =  £21

So, Donna receives £21

The set of numbers that are possible values for x in the inequality x < -3 is: {-9, -7, -5}. (Option 2)

To find the possible values of x that satisfy the inequality x < -3, we need to look for numbers that are less than -3. Among the given sets of numbers, only {-9, -7, -5} contains numbers that are less than -3, so this is the set of possible values for x.

{-33, -22, -11} are all greater than -3, so they are not possible values for x in the given inequality.

{5, 7, 9} and {-5, 0, 5} are also greater than -3, so they are not possible values for x in the given inequality.

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Complete Question:

Select all the sets of numbers that are possible values for x in the inequality, x<-3.

Answer:

-6y

Step-by-step explanation:

-5x + 2y + 5x - 8y =

= -5x + 5x + 2y - 8y

= -6y

Answer:

10x-6y

Step-by-step explanation:

5x+5x=10x
and 2y-8y=-6y
Let me know if this helps

48 is  length of chord AC.

How is a chord defined?

Three or more notes come together to form a chord. A single note, referred to as the root, serves as the foundation for chords. Triads will be covered in this lesson.

                         A root, third, and fifth are used to make them. A line segment connecting two locations on the circle's circumference is what is referred to as the chord of a circle. The diameter, which runs through the centre of the circle, is the lengthiest chord of the circle.

since OD intersects AB to form a right angle at point B, so it bisects the chord AC.

so AB = BC      (1)

given AB = 7x - 4

and CB = 6x  

from (1) we have

7x - 4 = 6x

x = 4

so AB = 7(4) - 4 = 24

CB = 6(4) = 24

length of chord AC = AB + BC = 24 + 24 = 48

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The complete question is -

Segment OD intersects AB to form a right angle at point B.

If AB = 7x - 4 and CB = 6x, what is the length of the chord AC?

It's difficult to determine the validity of Georgia's conclusion without more information about her sampling method. If Georgia used a random sampling method where each student at Jones Middle School had an equal chance of being selected to participate in the survey, then her conclusion could be considered more valid.

b. To conduct the survey to get the most valid conclusion from the most representative sample, she could use a random sample.

In addition, the sample size and the margin of error of the survey are important factors to consider when evaluating the validity of the conclusion.

Georgia could consider using a random sampling method where each student at Jones Middle School has an equal chance of being selected to participate in the survey. She could also increase the sample size to get a more accurate representation of the entire student population. It would also be important to consider the margin of error and confidence level of the survey to ensure that the results are reliable. Finally, Georgia could also consider stratifying her sample by grade level or other relevant factors to ensure that the sample is representative of the entire student population at Jones Middle School.

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Answer:

Step-by-step explanation:

Answer: 0.0625 g/cm^3

Formula for density: d= mass/volume

we have mass m=50g

volume of rectangular prism = length x height x width

volume of book = 5cm x 16cm x 10cm = 800cm^3

density = mass / volume

density = 50g/800cm^3

density = 0.0625 g/cm^3

R carries inversely as the cube S . If R=9 when S=3 ,  S= 4, when R= 243÷64.

Inverse proportionality is a mathematical relationship between two variables, in which an increase in one variable leads to a decrease in the other variable in such a way that their product remains constant. In other words, if the value of one variable is multiplied by a certain factor, the value of the other variable will be divided by the same factor.

Mathematically, two variables x and y are said to be inversely proportional if their relationship can be expressed as:

x * y = k

where k is a constant, and the symbol * denotes multiplication.

For example, the distance travelled by a car is inversely proportional to the time taken to travel that distance, assuming the car maintains a constant speed. If we let d represent the distance travelled and t represent the time taken, then we can express their relationship as:

d * t = k

where k is a constant

If R varies inversely as the cube of S, then we know that:

R ∝ [tex]\frac{1}{S^{3} }[/tex]

We can express this relationship using a proportionality constant k:

R = [tex]\frac{k}{S^{3} }[/tex]

To find the value of k, we can use the given information that R = 9 when S = 3:

9 = [tex]\frac{k}{3^{3} }[/tex]

9 = [tex]\frac{k}{27 }[/tex]

k = 9 * 27

k = 243

Now we can use this value of k to find S when R = [tex]\frac{243}{64}[/tex]:

[tex]\frac{243}{64}=\frac{243}{S^{3} }[/tex]

Simplifying this equation, we get:

S³ = [tex]\frac{243*64}{243}[/tex]

S³ = 64

S = ∛64

S = 4

Therefore, when R = [tex]\frac{243}{64}[/tex], S = 4.

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The perimeter of the figure, given the rectangles and the total area, can be found to be 48 inches

The total area is 75 in² which means that the areas of all 5 rectangles add up to 75 in². We can use this to solve for x to be:

5 × ( x × ( x - 2 )) = 75 in²

5 × ( x² - 2x ) = 75 in²

x² - 2x = 15 in²

(x - 5)(x + 3) = 0

x - 5 = 0 or x + 3 = 0

x = 5 or x = -3

Dimensions of a rectangle cannot be negative so x is equal to 5.

The perimeter is then:

= ( x - 2 ) + x + ( x - 2 ) + x + (x - 2 ) + x + ( x - 2 ) + x + (x - 2 ) + x + ( x -2 ) + x

= ( 5 - 2 ) + 5 + ( 5 - 2 ) + 5 + (5 - 2 ) + 5 + ( 5 - 2 ) + 5 + (5 - 2 ) + 5 + ( 5  -2 ) + 5

= 48 inches

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The 2nd term in this given linear sequence {-5, -7, -9, -11, -13}  is -7. So the correct answer is -7.

A linear sequence repeatedly increases or decreases by the same amount. The number added (or subtracted) at each stage of the linear sequence remains the same.

A linear sequence goes from one term to the next by always adding (or subtracting) the same value. The number added (or subtracted) at each stage of the linear sequence is called the common difference.

Examples of linear sequences occur when things change by the same amount each time.

Here is the linear sequence: 8, 11, 14, 17...

To find the next term in this sequence we calculate the common difference.

In this example the common difference is +3.

8 (+3) 11 (+3) 14 (+3) 17 (+3) …

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Answer: What grade are you in? Because I had to do this for my 8th or 9th grade year as a homeschooler.... I never had help...I had the same brand laptop and my studies were done on T4L......

Step-by-step explanation:

x2 +3x--3x+5 I think give me a few minutes to check myself

Answer:

x<-8

Step-by-step explanation:

The arrow shows that x must be less than -8. We also know that the circle is not filled in. This means that x must be less than -8 and x≠-8. Hence, x<-8.

A statistic that is used to measure how data is distributed in a population is called a measure of dispersion. This statistic gives context to large datasets by providing an indication of how spread out the data is. This measure of dispersion is important because it helps to identify patterns and trends in the data.

For example, if the measure of dispersion is high, it indicates that the data is spread out and there is significant variation between data points. On the other hand, a low measure of dispersion suggests that the data is clustered together and there is little variation between data points.

This measure of dispersion is used to compare datasets, identify outliers, and make predictions about future trends. Ultimately, the measure of dispersion is an important tool for understanding the context of large datasets.

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Answer:

Step-by-step explanation:

(-+) × (-8) + (-3)³=32

The subtraction property of equality is used for the justification of step 2 in the solution.

The subtraction property of equality states that subtracting the same number from both sides of an equation does not affect the equality.

Therefore, Justify the property used for step 2 in the equality.

1 / 2 r + 1 / 2  = - 2 / 7 r + 6 / 7  - 5

Step 1 : 1 / 2 r + 1 / 2  = - 2 / 7 r - 29 / 7

Step 2: 1 / 2 r = - 2 / 7 r - 65 / 14

We had to subtract 1 / 2 from both sides of the equation to arrive at step 2. Therefore, the subtraction property of equality is the justification for step 2 in the solution.

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We can infer that other beings possess consciousness based on their behavior and similarities to ourselves

Consciousness refers to the subjective experience of awareness, self-awareness, and the ability to perceive, reason, and make decisions.

However, the question arises whether animals, plants, or even machines possess consciousness.

To answer this question, we must rely on behavioral, neuroscientific, and philosophical evidence.

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The probability that the 100 orders can be filled without reordering components, if the manufacturer stocks 105 components is 1, or 100%.

The probability of being able to fill 100 orders without reordering components depends on the total number of components stocked. If the manufacturer stocks 105 components, then the probability of being able to fill 100 orders without reordering components is 1. Since 105 is greater than or equal to 100, the probability of being able to fill the orders without reordering components is 1 (100%).

Mathematically, this can be expressed as P(Filling 100 orders) = 1, where P stands for probability, and Filling 100 orders stands for the event of being able to fill 100 orders without reordering components.

This is because, if the manufacturer stocks 105 components, then they have enough components to fulfill the 100 orders without reordering components. So, the probability of being able to fulfill the orders without reordering components is 100%, or 1.

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The average period of the trials that were conducted with an amplitude of 10 degrees is 1.694 seconds.

What is amplitude ?

In mathematics, amplitude refers to the maximum displacement or distance from the equilibrium position of a periodic function, such as a sine or cosine wave. In other words, if a periodic function oscillates back and forth between two extreme values, the amplitude is the maximum distance from the average value or midpoint of the oscillation to one of the extreme values.

To calculate the average period of the trials that were conducted with an amplitude of 10 degrees, we simply add up all the periods and divide by the total number of trials.

10 degrees: 1.66 s, 1.700 s, 1.71 s, 1.68 s, 1.72 s

Average period = (1.66 + 1.700 + 1.71 + 1.68 + 1.72) / 5 = 1.694 seconds

Therefore, the average period of the trials that were conducted with an amplitude of 10 degrees is 1.694 seconds.

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The price that maximizes revenue is p=16, and the corresponding quantity sold is q(16) = 64.

To find the price that maximizes revenue, we need to determine the revenue function R(p), which is equal to the product of price p and quantity sold q(p), or R(p)=pq(p). From the problem, we have q(p)=128-4p.

Substituting this into the revenue function, we get [tex]R(p)=p(128-4p)=128p-4p^2.[/tex]

To find the price that maximizes revenue, we need to find the maximum of the quadratic function R(p)=-4p²+128p. We can do this by finding the vertex of the parabola, which occurs at

[tex]p=-\frac{b}{2a}=-\frac{128}{2(-4)}=16[/tex]

Therefore, the price that maximizes revenue is p=16, and the corresponding quantity sold is q(16)=128-4(16)=64.

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