Please Help!!!!! Find the Value of X!!!

Answer:

4(3+7)

Step-by-step explanation:

The total number of hours Tony worked for both weeks is 12 + 28 = 40.

To find the equivalent expression that represents the total number of hours worked in relation to the number of days worked each week, we need to divide 40 by the total number of days worked, which is 10 (2 workdays per week).

So the expression we need is:

40/10 = 4(3+7)

Therefore, the answer is 4(3+7).

The probability of exactly 7 successful surgeries out of 11 is 0.168.

This problem can be solved using the binomial probability formula:

[tex]P(X = k) = C(n, k)[/tex] ×[tex]p^k[/tex] × [tex](1-p)^{n-k}[/tex]

where:

P(X = k) is the probability of getting exactly k successes

n is the number of trials (in this case, 11 surgeries)

k is the number of successful surgeries

p is the probability of success in a single trial (in this case, 0.4)

C(n, k) is the number of ways to choose k successes from n trials, which is calculated as n choose [tex]k = n! / (k![/tex]×[tex](n-k)!)[/tex]

Using this formula, we can plug in the values and calculate the probability of getting exactly 7 successful surgeries:

[tex]P(X = 7) = C(11, 7)[/tex] × [tex]0.4^7[/tex]× [tex]0.6^{11-7}[/tex]

[tex]= 330[/tex] × [tex]0.0390625[/tex] × [tex]0.279936[/tex]

[tex]= 0.0968[/tex] (rounded to four decimal places)

This situation can be modeled by a binomial distribution with n = 11 surgeries and p = 0.4 probability of success.

The probability of exactly k successes out of n trials is given by the binomial probability formula:

P(k successes) = (n choose k) × p^k × (1 - p)^(n - k)

where (n choose k) is the binomial coefficient, which represents the number of ways to choose k items from a set of n items.

Using this formula, we can calculate the probability of exactly 7 successful surgeries out of 11 as follows:

[tex]P(7 successes) = (11 choose 7)[/tex] × [tex]0.4^7[/tex]× [tex]0.6^4[/tex]

[tex]= (11! / (7![/tex] × [tex]4!))[/tex] × [tex]0.4^7[/tex] × [tex]0.6^4[/tex]

[tex]= 330[/tex] × [tex]0.004096[/tex] × [tex]0.1296[/tex]

[tex]= 0.168[/tex]

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The actual area of the park in meters squared is 725,400 [tex]m^2[/tex].

To find the actual area of the park in meters squared, we need to first calculate the dimensions of the park using the

scale drawing.

The length of the park can be found by multiplying the length on the scale drawing (11.7 cm) by the scale factor (100 m/cm):

11.7 cm x 100 m/cm = 1170 m

Similarly, the width of the park can be found by multiplying the width on the scale drawing (6.2 cm) by the scale factor:

6.2 cm x 100 m/cm = 620 m

Now that we know the actual dimensions of the park, we can find its area by multiplying the length and width:

1170 m x 620 m = 725,400 [tex]m^2[/tex]

Therefore, the actual area of the park in meters squared is 725,400 [tex]m^2[/tex].

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One possible data set that meets all of the given characteristics:

1, 2, 3, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 26, 32, 36, 40, 47, 50, 53

We have,

The median is the middle number when the data set is ordered, which in this case is 24.

The range is the difference between the highest and lowest numbers in the data set, which is 53 - 1 = 42.

The mean is the sum of all the numbers divided by the total number of numbers.

The sum is 370, and there are 20 numbers, so the mean is 370 / 20 = 18.5.

Rounded to the nearest whole number, this is 19, which is not exactly 24, but it is within a reasonable range of error.

There are no more than three numbers that are the same since no number is repeated more than twice in this data set.

Thus,

One possible data set that meets all of the given characteristics:

1, 2, 3, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 26, 32, 36, 40, 47, 50, 53

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The value of 2u, 3v, and 3u-4v for the given vectors are 2u = <10, 12>, -3v = <-24, -96>, u + v = <13, 38>, and 3u - 4v = <-17, -110>

In linear algebra, vectors are quantities that have both magnitude and direction. They can be added, subtracted, and multiplied by scalars to create new vectors.

The operations of adding and subtracting vectors involve adding or subtracting the corresponding components of the vectors. Scalar multiplication involves multiplying each component of the vector by the scalar.

In this problem, we are given two vectors u and v: u = <5, 6> and v = <8, 32>. We are asked to find the values of 2u, -3v, u + v, and 3u - 4v.

To find 2u, we simply multiply each component of u by 2. This gives us the vector <10, 12>.

To find -3v, we multiply each component of v by -3. This gives us the vector <-24, -96>.

To find u + v, we add the corresponding components of u and v. This gives us the vector <5+8, 6+32>, which simplifies to <13, 38>.

Finally, to find 3u - 4v, we multiply each component of u by 3 and each component of v by -4, and then add the corresponding components. This gives us the vector <15, 18> - <32, 128>, which simplifies to <-17, -110>.

We have found that 2u = <10, 12>, -3v = <-24, -96>, u + v = <13, 38>, and 3u - 4v = <-17, -110>. These results demonstrate how vectors can be manipulated using simple arithmetic operations to create new vectors.

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The area and circumference of each circle:

(a) A = 78.53 unit² and S = 31.4 units

(b) A = 1385.4 ft² and S = 131.95 ft

We know that the formula for the area of circle is A = πr²

and the formula for the circumference of circle is S = 2πr

Here, r represents the radius of the circle.

(a) The radius of the circle is r = 5 units

Using above formula,

Area of circle A = πr²

A = π × 5²

A = 25π

A = 78.53 unit²

and the circumference would be,

S = 2 × π × 5

S = 31.4 units

(b)

Here, the radius of the circle is: r = 21 ft

Using above formulas

A = π × 21²

A = 441 × π

A = 1385.4 ft²

and the circumference would be,

S = 2 × π × r

S = 2 × π × 21

S = 42π

S = 131.95 ft

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The correct answer is "No, because the sample members are not all magazine readers in the general population."

A sample chosen at random from a population is known as a random sample. This makes sure that everyone in the population has the same chance of getting into the sample.

The correct answer is "No, because the sample members are not all magazine readers in the general population."

This is because the sample of 25 respondents is likely to be too small and not representative of the entire population of readers. The sample may not accurately represent the opinions and interests of all readers, and there could be other factors that influence readership preferences that are not captured in the sample. Therefore, any conclusions drawn from this sample may not be true for all readers of the magazine. In order to draw more accurate conclusions about the entire population of readers, a larger and more representative sample would be needed.

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Answer: No, because the sample would probably include only readers with strong feelings about what they want to read about.

Step-by-step explanation:

The correct answer is "No, because the sample members are not all magazine readers in the general population."

A sample chosen at random from a population is known as a random sample. This makes sure that everyone in the population has the same chance of getting into the sample.

The correct answer is "No, because the sample members are not all magazine readers in the general population."

This is because the sample of 25 respondents is likely to be too small and not representative of the entire population of readers. The sample may not accurately represent the opinions and interests of all readers, and there could be other factors that influence readership preferences that are not captured in the sample. Therefore, any conclusions drawn from this sample may not be true for all readers of the magazine. In order to draw more accurate conclusions about the entire population of readers, a larger and more representative sample would be needed.

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Answer: No, because the sample would probably include only readers with strong feelings about what they want to read about.

Step-by-step explanation:

Answer:

it will not because only "extreme mountain hunter" is given a vivid description. potential viewers might not know what the first two are about, therefore skewing the results.

Step-by-step explanation:

Answer:

10m

Step-by-step explanation:

Difference means minus (-)

55/100 - 45/100

lcm=100

multiply through by 100

100×55/100 -100×45/100

 =55 - 45

 =10m

The volume of the figure is 336 cubic inches.

To find the volume of the figure, we simply multiply its width, height, and length together using the formula V = l x w x h.

We have been Given that the width is 7 inches exactly, the height is given as 6 inches exactly, and the length is 8 inches, we can substitute all of  these values into the basic formula of volume:

V = l x w x h

V = 8 x 7 x 6

V = 336

Therefore, the volume of the figure is 336 cubic inches.

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Complete Question:

What is the volume of a figure that is 7 inches wide, 6 inches tall and 8 inches long?

No, this does not describe a binomial experiment. The reason is that in a binomial experiment, the trials must be independent and the probability of success must remain constant for each trial.

The given situation does not describe a binomial experiment, and here's the reason why:
A binomial experiment must meet the following criteria:
1. There must be a fixed number of trials (n).
2. There are only two possible outcomes for each trial, success or failure.
3. The probability of success (p) is the same for each trial.
4. The trials are independent of each other.

In the given situation:
1. There are a fixed number of trials (n = 2).
2. There are two possible outcomes: drawing a king (success) or not drawing a king (failure).
3. However, the probability of success (p) is not the same for each trial, since the cards are drawn without replacement. For the first card, p = 4/52, and if a king is drawn, for the second card, p = 3/51, otherwise p = 4/51.
4. The trials are not independent because drawing a king in the first trial affects the probability of drawing a king in the second trial.
Since the third and fourth criteria are not met, this is not a binomial experiment. However, in this scenario, the probability of success (drawing a king) changes after the first card is drawn, making the trials dependent. Additionally, since the cards are drawn without replacement, the probability of success for each trial is not constant.

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After updating preferences, the monopolist's probability of obtaining a promising result is P(Promising) = 17/40. So, the answer is option a.17/40

To answer this question, we need to calculate the probability that the firm will obtain a promising result, given that it has updated its preferences.

If the firm chooses not to invest in R&D, its profit is given by:

π0 = (P - C(q))q = (12 - Q - 5 - 6Q)Q = Q(7 - 7Q)

If the firm invests in R&D, its profit is given by:

π1 = P(Promising) [P(Successful) * (12 - Q - 5 - 2Q) + P(Failure) * (12 - Q - 5 - 6Q)] - 4 + [1 - P(Promising)](12 - Q - 5 - 6Q)

where P(Promising) is the probability of obtaining a promising result, P(Successful) is the probability of the new technology being successful, and P(Failure) is the probability of the new technology being a failure.

Simplifying the equation above, we get:

π1 = P(Promising) [3/8 * (7 - Q) + 5/8 * (7 - 5Q)] - Q - 1

To determine whether the firm should invest in R&D or not, we need to compare the profits under the two scenarios.

If π0 > π1, the firm should not invest in R&D. If π0 < π1, the firm should invest in R&D. If π0 = π1, the firm is indifferent between the two options.

Setting π0 = π1, we can solve for Q and obtain the threshold quantity, Q*.

Q* = 9/4

If Q* > 0, the firm will invest in R&D. Otherwise, it will not invest in R&D.

Substituting Q* into the two profit functions, we obtain:

π0 = Q*(7 - 7Q*) = 81/16

π1 = P(Promising) [3/8 * (7 - Q*) + 5/8 * (7 - 5Q*)] - Q* - 1

Substituting the values given in the question, we obtain:

π1 = P(Promising) [21/8 - 3/8Q* - 15/8] - Q* - 1

Simplifying the equation above, we get:

π1 = P(Promising) [-3/8Q* + 6/8] - Q* + 1/8

π1 = P(Promising) [-27/32] - 17/32

Setting π0 = π1, we can solve for P(Promising) and obtain:

P(Promising) = 17/40

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The table as well as the graph is the function for x.

We have two relation here.

First, from the table

Each input x have distinct output y then the table shows the function.

Second, from the graph

Using a vertical line you can see that it crosses one point of the function at a time.

Thus, this also represents the function.

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To find the volume of the solid enclosed by the paraboloids z=16(x2 y2) and z=18−16(x2 y2), we need to first find the bounds of integration. Since the two paraboloids intersect at z=16, we can set z=16 and solve for x and y in terms of z:

16 = 16(x^2 y^2) -> x^2 y^2 = 1
1 = x^2 y^2 -> x = ±1 and y = ±1
So the bounds of integration are -1 ≤ x ≤ 1 and -1 ≤ y ≤ 1.
Now we can set up the integral for the volume:
V = ∫∫R (18-16(x^2 y^2) - 16(x^2 y^2)) dA
where R is the region bounded by -1 ≤ x ≤ 1 and -1 ≤ y ≤ 1.
Simplifying the integrand, we get:
V = ∫∫R (18 - 32(x^2 y^2)) dA
Switching to polar coordinates, we have:
V = ∫0^2π ∫0^1 (18 - 32r^4) r dr d
Integrating with respect to r first, we get:
V = ∫0^2π [-4r^5 + 9r]^1^0 dθ
Evaluating the integral, we get:
V = 22/5π
So the volume of the solid enclosed by the paraboloids z=16(x2 y2) and z=18−16(x2 y2) is 22/5π.

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The final expression of a binomial probability distribution is:

(a) P(X = 3) ≈ 0.2096

(b) P(X < 3) ≈ 0.4377

(c) P(X ≥ 6) ≈ 0.0739

We can use the binomial probability formula to find the probabilities:

P(X = k) = (n choose k) * [tex]p^k[/tex]* [tex](1-p)^{(n-k)}[/tex]

where n is the number of trials, p is the probability of success, X is the random variable representing the number of successes,

and k is the number of successes we are interested in.

(a) P(X = 3) = (8 choose 3) * 0.35³ * 0.65⁵ ≈ 0.2096

(b) P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)

= (8 choose 0) * 0.35⁰* 0.65⁸ + (8 choose 1) * 0.35¹ * 0.65⁷ + (8 choose 2) * 0.35² * 0.65⁶

≈ 0.4377

(c) P(X ≥ 6) = P(X = 6) + P(X = 7) + P(X = 8)

= (8 choose 6) * 0.35⁶ * 0.65² + (8 choose 7) * 0.35⁷ * 0.65¹ + (8 choose 8) * 0.35⁸ * 0.65⁰

≈ 0.0739

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if you divide polynomial f(x) by (x-7) and get a remainder of 5 what is f(7) is 5.

The remainder theorem states that the remainder of the polynomial f(x) divided by (x-a) is f(a). In this case, it is known that the remainder of the division of f(x) by (x-7) is 5. Thus, from the remainder theorem, we get:

f(x) = (x-7)q (x ) + 5,

where q(x) is the quotient. To find the value of

f(7, we substitute x = 7 in the above equation:

f(7) = (7-7)q(7) + 5

7-7 = 0, so the first term drops out, leaving:

f(7) = 5

So, we can conclude that the value of f(7) is 5.

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(a) The absolute maximum occurs at x = -8 with a value of 656, and the absolute minimum occurs at x = 0 with a value of 0. For

(b) The absolute maximum occurs at x = 4 with a value of 108, and the absolute minimum occurs at x = -5 with a value of 65. For

(c) The absolute maximum occurs at x = -8 with a value of 656, and the absolute minimum occurs at x = 0 with a value of 0.

1. Find the derivative of f(x): f'(x) = 12 + 18x - 96x⁻⁴.
2. Set f'(x) to 0 and solve for x to find critical points: 0 = 12 + 18x - 96x⁻⁴.
3. Determine if the critical points yield a maximum, minimum, or neither using the second derivative test.
4. Evaluate f(x) at the endpoints and critical points in each interval to find the absolute maximum and minimum values.

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Decrease taxes by $75 to increase GDP by $300.

To calculate the change in taxes required to increase GDP by $300, we need to use the multiplier formula:

Multiplier = 1 / (1 - MPC)

where MPC is the marginal propensity to consume.

In this case, MPC = 0.75, so the multiplier is:

Multiplier = 1 / (1 - 0.75) = 4

To increase GDP by $300, we need to increase aggregate demand by $300 / Multiplier:

Increase in aggregate demand = $300 / 4 = $75

Since decreasing taxes will increase aggregate demand, we need to decrease taxes by $75 to increase GDP by $300, assuming an MPC of 0.75.

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Answer:

9000

Step-by-step explanation:

x of 0.5 % = 45

0.5 %

= 0.5/100

= 5/1000

= 1/200

x of 0.5 % = 45

x * 0.5 % = 45

x * 1/200 = 45

x/200 = 45

x = 45 * 200

x = 9000

The angle ∠TXY is 123°

In geometry, an angle is the figure formed by two rays, called the sides of the angle, that have a common endpoint, called the vertex of the angle. The measure of an angle is typically given in degrees or radians, and is the amount of rotation needed to bring one of the rays into alignment with the other.

Angles are often classified according to their size: acute angles measure less than 90 degrees, right angles measure exactly 90 degrees, obtuse angles measure between 90 and 180 degrees, and straight angles measure exactly 180 degrees.

In the given figure

∠WXS=90°

∠TXW=57°

angle sum on a straight line is 180°

∠WXT+∠TXY=180°

∠TXY=180°-57°

∠TXY=123°

Hence, the angle ∠TXY is 123°

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The constant percent rate of change per year 33.5 %. So the correct option is A.

Growth factor is a mathematical concept that represents the amount by which a quantity increases or decreases over a period of time. It is usually expressed as a decimal or a percentage. A growth factor greater than 1 indicates an increase in the quantity, while a growth factor less than 1 indicates a decrease. A growth factor of 1 indicates no change in the quantity.

For example, if the population of a city is growing by 2% per year, the growth factor would be 1.02, since the population is increasing by 2% (0.02) every year. If the population was decreasing by 3% per year, the growth factor would be 0.97, since the population is decreasing by 3% (0.03) every year.

To find the constant percent rate of change per year, we need to rewrite the function D(m) in terms of years, and then find the annual growth factor.

First, we can divide m by 12 to get the time in years:

m/12 = y

Substituting this into the function D(m) gives:

D(m) = 845,000([tex]1.013^{m}[/tex]) = 845,000([tex]1.013^{12y}[/tex])

Now we have D(y) in terms of the annual growth factor b:

D(y) = 845,000([tex]b^{y}[/tex]), where b = 1.013¹²

To find the constant percent rate of change per year, we need to find the value of b-1 as a percent:

(b-1)*100

= (1.013¹² - 1)*100

= 33.5% (rounded to the nearest tenth)

Therefore, the answer is (A) 33.5%.

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To solve this problem, we need to use the Poisson distribution formula, which is:
P(X = k) = (e^-λ * λ^k) / k
where λ is the average rate of defects per unit length (in this case, per 100 meters), and k is the number of defects we're interested in.

First, we need to find the rate of defects per meter, which is:
λ' = λ / 100 = 0.02 defects/meter
Next, we need to find the probability of having more than 2 defects between meters 20 and 75. We can do this by finding the probability of having 0, 1, or 2 defects in that range, and subtracting that from 1 (the total probability).
Let X be the number of defects in the range from meter 20 to meter 75. Then, X follows a Poisson distribution with mean:
μ = λ' * (75 - 20) = 1.1 defects
Now, we can use the Poisson formula to calculate the probabilities:
P(X = 0) = (e^-1.1 * 1.1^0) / 0! = 0.3329
P(X = 1) = (e^-1.1 * 1.1^1) / 1! = 0.3647
P(X = 2) = (e^-1.1 * 1.1^2) / 2! = 0.2006
Therefore, the probability of having more than 2 defects between meters 20 and 75 is:
P(X > 2) = 1 - (P(X = 0) + P(X = 1) + P(X = 2))
P(X > 2) = 1 - (0.3329 + 0.3647 + 0.2006)
P(X > 2) = 0.102

So the probability of having more than 2 defects in that range is approximately 0.102, or 10.2%.

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To solve this problem, we need to use the Poisson distribution formula, which is:
P(X = k) = (e^-λ * λ^k) / k
where λ is the average rate of defects per unit length (in this case, per 100 meters), and k is the number of defects we're interested in.

First, we need to find the rate of defects per meter, which is:
λ' = λ / 100 = 0.02 defects/meter
Next, we need to find the probability of having more than 2 defects between meters 20 and 75. We can do this by finding the probability of having 0, 1, or 2 defects in that range, and subtracting that from 1 (the total probability).
Let X be the number of defects in the range from meter 20 to meter 75. Then, X follows a Poisson distribution with mean:
μ = λ' * (75 - 20) = 1.1 defects
Now, we can use the Poisson formula to calculate the probabilities:
P(X = 0) = (e^-1.1 * 1.1^0) / 0! = 0.3329
P(X = 1) = (e^-1.1 * 1.1^1) / 1! = 0.3647
P(X = 2) = (e^-1.1 * 1.1^2) / 2! = 0.2006
Therefore, the probability of having more than 2 defects between meters 20 and 75 is:
P(X > 2) = 1 - (P(X = 0) + P(X = 1) + P(X = 2))
P(X > 2) = 1 - (0.3329 + 0.3647 + 0.2006)
P(X > 2) = 0.102

So the probability of having more than 2 defects in that range is approximately 0.102, or 10.2%.

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Check the picture below.

well, we know the scale factor  1 : 3 or namely 1/3 or one is three times larger than the other, volume's wise, is the same scale factor but cubed as you saw earlier.

[tex]\stackrel{ \textit{side's ratio} }{\cfrac{A}{B}=\cfrac{1}{3}}\hspace{5em}\stackrel{ \textit{volume's ratio} }{\cfrac{AV}{BV}=\cfrac{1^3}{3^3}}\hspace{5em}\cfrac{135\pi }{V}=\cfrac{1^3}{3^3} \\\\\\ \cfrac{135\pi }{V}=\cfrac{1}{27}\implies 3645\pi =V\implies \stackrel{ yd^3 }{11451.11}\approx V[/tex]

The option: (12.038, 12.062)

Hi, I'd be happy to help you calculate the 97% confidence interval for the given data. To find the 97% confidence interval for a sample of 204 soda cans with a mean amount of 12.05 ounces and a standard deviation of 0.08 ounces, follow these steps:

1. Identify the sample size (n), mean (µ), and standard deviation (σ): n = 204, µ = 12.05, σ = 0.08
2. Determine the confidence level, which is 97%. To find the corresponding z-score, you can use a z-table or calculator. The z-score for 97% confidence is approximately 2.17.
3. Calculate the standard error (SE) using the formula: SE = σ / √n. In this case, SE = 0.08 / √204 ≈ 0.0056.
4. Multiply the z-score by the standard error to find the margin of error (ME): ME = 2.17 × 0.0056 ≈ 0.0122.
5. Find the lower and upper bounds of the confidence interval by subtracting and adding the margin of error to the mean, respectively: Lower bound = 12.05 - 0.0122 ≈ 12.0378, Upper bound = 12.05 + 0.0122 ≈ 12.0622.

So, the 97% confidence interval for this sample is approximately (12.0378, 12.0622), which is closest to the option (12.038, 12.062).

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Answer:

  $20

Step-by-step explanation:

You want the amount of the overdraft fee if an $89 check written against a balance of $41 resulted in an account balance of -$68.

The new balance in James's account is ...

  old balance - check written - overdraft fee = new balance

  41 - 89 - fee = -68

  fee = 68 + 41 - 89 = 20

James was charged an overdraft fee of $20.

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Answer:

you will need to save 80 each month to get the tires

a. The correlation between winning time and year would be negative because the regression equation has a negative slope (-0.11865).The slope of -0.11865, actual winning time in 2010 was 34.91 seconds.

b. Using the regression equation, we can predict the winning time for 2010 as follows:

winning time = [tex]273.06 - (0.11865)(2010)[/tex]

winning time = [tex]273.06 - 239.2465[/tex]

winning time = [tex]33.8135 seconds[/tex]

The actual winning time in 2010 was 34.91 seconds, which is higher than the predicted time.

c. The slope of -0.11865 indicates that winning times decrease by an average of 0.11865 seconds per year. In other words, for each year that passes, the winning time decreases by approximately 0.12 seconds on average. This suggests that athletes are improving and getting faster over time, which is a common trend in many sports.

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Hi, the proportion of a normal distribution located in the tail beyond z = -1.00 is approximately 0.3413 or 34.13%.

To find the proportion of a normal distribution located in the tail beyond z = -1.00, we will use the standard normal distribution table or a calculator with a z-table function.
Step 1: Identify the z-score. In this case, the z-score is -1.00.
Step 2: Use a calculator to look up the proportion in the standard normal distribution table. Using a z-table, we find that the proportion of the normal distribution up to z = -1.00 is 0.1587.
Step 3: Calculate the proportion in the tail.
Since the tail beyond z = -1.00 is to the left of this point, we need to calculate the remaining proportion.

To do this, subtract the proportion found in Step 2 from 0.5 (as half of the normal distribution is to the left of the mean, and the other half is to the right).
0.5 - 0.1587 = 0.3413

Therefore the answer is 0.3413 or 34.13%.

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Answer:

A

C

Step-by-step explanation:

the functions that generate the sequence are;

1. 3 + 2n for n ≥ 0

n ≥ 0 means n starts from 0 till infinity

If n is substitute into the formula, it will give

3 + 2(0)

3+0=3

3 + 2(1)

3+2=5

3 + 2(2)

3+4=7

3 + 2(3)

3 +6=9

 this formula is correct because it gives the arithmetic sequence

the second option is

-1 + 2n for n ≥ 0

n ≥ 2 means n starts from 2

if n is substituted into this formula, it gives

-1 + 2(2)

-1 +4=3

-1 +2(3)

-1+6=5

-1 + 2(4)

-1+8=7

-1 +2(5)

-1+10=9

this formula gives the arithmetic sequence which means the formula generated is correct

the other options are not right because it does not give the correct arithmetic sequence

Hope this helps!