LOOK AT THE PICTUREE ILL TRY GIVING BRAINLYEST

Answer:

1. 3x = 12 . the answer is d. x = 4

In the equation y = $7.20x + $790, "y" represents the total cost. An equation is a mathematical statement that shows the relationship between two or more variables. In this equation, there are two variables - "x" and "y". The variable "x" represents the number of units produced or sold, while "y" represents the total cost.

The coefficient of "x" in the equation, which is 7.20, represents the variable cost per unit. This means that for each unit produced or sold, there is an additional cost of $7.20. The constant term, which is $790, represents the total fixed costs. Fixed costs are those costs that do not vary with the number of units produced or sold.To find the total cost of producing or selling a certain number of units, we can plug in the value of "x" into the equation and solve for "y". For example, if we want to find the total cost of producing 100 units, we can substitute x=100 into the equation:
y = $7.20(100) + $790
y = $720 + $790
y = $1510
Therefore, the total cost of producing 100 units is $1510. In summary, "y" represents the total cost in the given equation, which is determined by both fixed and variable costs.
In the equation y = $7.20x + $790, "y" represents option C: total costs. This equation has two components: "$7.20x" represents the variable costs per unit, where x is the number of units, and "$790" represents the total fixed costs. By adding these two components together, you get the total costs (y) for producing x units.

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The correct true statement is the swimmer comes back up 9 seconds after the timer was started.

The maximum height of a function is the  point where the velocity the body is zero.

Given the function that represent the height of the swimmer as  h(t)=t^2−12t+27

If the velocity of the function is zero, hence;

h'(t) = 2t - 12

0 = 2t - 12

2t = 12

t = 6secs

Substitute t = 6 into the function as shown:

h(6) = 6^2−12(6)+27

h(6) = 36 - 72 + 27

h(6) = -36 + 27

h(6) = -9 feet

Hence the correct true statement is the swimmer comes back up 9 seconds after the timer was started.

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Answer:

X is equal to 5

Step-by-step explanation:

The tangents of a circle is always equal, which means 2x + 7 = 5x - 8. After you solve this equation, you will get that X = 5.

c). The entities on which data are collected are called elements.

Data collection is a process of gathering information from different sources which is later used for analysis and interpretation. Data is usually collected from elements, which are individual units like people, organizations, or any other physical or virtual entity.

Each element has a set of characteristics or attributes which are collected to form the data. For example, if data is being collected from people, the attributes would include age, gender, occupation, income, etc. This data is then collected and stored in some form that can be used for further analysis.

Data can also be collected from populations, which are a collection of elements or a group of elements with certain features in common. In this case, the data collected is the average of all the elements in the population, rather than data from individual elements.

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Answer:

12

..... ....... ......

The given integral ∫(4x+3) dx is an improper integral because it has either an infinite interval or an integrand that is not defined at certain points. It can be rewritten as a limit of an integral to evaluate whether it converges or diverges.

The integral ∫(4x+3) dx is an improper integral because it has a numerator that is not a constant and a denominator that is not a simple polynomial. Improper integrals arise when the interval of integration is infinite or when the integrand is not defined at certain points within the interval.

To rewrite the integral as a limit of an integral, we consider the upper limit of integration as b and take the limit as b approaches a certain value. In this case, we can rewrite the integral as ∫[a, b] (4x+3) dx, and then take the limit of this integral as b approaches a specific value.

To determine whether the integral converges or diverges, we need to evaluate the limit of the integral. By computing the antiderivative of the integrand and evaluating it at the limits of integration, we can determine the definite integral. If the limit of the definite integral exists as the upper limit approaches a specific value, then the integral converges. Otherwise, it diverges.

In conclusion, without specifying the limits of integration, it is not possible to evaluate whether the given integral converges or diverges. The evaluation requires the determination of the limits and computation of the definite integral or finding any potential discontinuities or infinite behavior within the integrand.

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Answer:

a₄ = 320

Step-by-step explanation:

To obtain a term in a geometric sequence , multiply the previous term by the common ratio r

r = \(\frac{a_{2} }{a_{1} }\) = \(\frac{20}{5}\) = 4 , then

a₄ = 4 × a₃ = 4 × 80 = 320

the square root of 139 is 11.78

Answer:

120 minutes

Step-by-step explanation:

the total bill was $58 so we have to subtract the $40 monthly bill part to find how much extra money she paid because her call was over 200 minutes

58-40=18

Then divide the $18 by $0.15 since the $18 is the total amount of each time she was charged $0.15 for going 1 minute over 200 minutes

18÷0.15 = 120

120 is te Amount Of minutes she went over her 200 minute limit

120 minutes

Taylor's total bill was $58 so then i had to subtract the $40 monthly bill part to find how much extra money she paid because her call was over 200 minutes

58-40=18

Then I divide the $18 by $0.15 since the $18 is the total amount of each time she was charged $0.15 for going  over 200 minutes

18÷0.15 = 120

120 is the amount of minutes she went over her 200 minute limit

-Millie

The sum of all edges of the regular quadrilateral Pyramid is approximately 66.68 cm.

The sum of all edges of a regular quadrilateral pyramid, we need to determine the number of edges in the pyramid and then calculate their total length.

A regular quadrilateral pyramid has a base that is a regular quadrilateral, meaning all sides of the base have the same length. Let's assume that each side of the base has a length of "a" cm.

The perimeter of the base is given as P = 30 cm, so each side of the base measures 30 cm divided by 4 (since there are four equal sides) which is 7.5 cm.

Now, let's consider the lateral face of the pyramid. A regular quadrilateral pyramid has four lateral faces, each of which is an isosceles triangle. The perimeter of a lateral face is given as 27.5 cm. Since there are three edges in each lateral face, the length of each edge is 27.5 cm divided by 3, which is approximately 9.17 cm.

Therefore, the sum of all the edges in the pyramid is calculated as follows:

Sum of edges = (4 × a) + (4 × 9.17)

Since we know that each side of the base (a) is 7.5 cm, we can substitute this value into the equation:

Sum of edges = (4 × 7.5) + (4 × 9.17)

            = 30 + 36.68

            = 66.68 cm

Hence, the sum of all edges of the regular quadrilateral pyramid is approximately 66.68 cm.

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Answer:

Numbers are 8  and  10

Step-by-step explanation:

    10 + 8 = 18

Answer:

-9x + 3

Step-by-step explanation:

You would distribute first.

− ( x + 3 ) − 2 ( 4x − 3 ) → -x − 3 − 8x + 6

(If you see a negative sign in front of a parenthesis without a number, its usually a negative 1)

From there, you would combine like terms.

-x − 3 − 8x + 6 → -9x + 3

Given:

Number of green peas = 475

Number of yellow peas = 193

Let's find the 94% confidence interval to estimate the percentage of yellow peas.

Where:

Total number of peas = 475 + 193 = 668

For the sample proportion, we have:

For a 94% confidence interval, the significance level will be:

1 - 0.94 = 0.06

For the critical value, using the z-table, we have:

Now, to find the 94% confidence interval, apply the formula::

Where:

To find the margin of error E, we have:

Thus, we have:

Hence the confidence interval will be:

Lower limit = 0.2559 ==> 25.59%

Upper limit = 0.3219 ==> 32.19 %

The confidence interval does not contain 0.25, hence we can say that the true results contradicts the expectations.

ANSWER:

The confidence interval does not contain the expectation of 25%, hence, the true results contradicts the expectation.

Answer:

75 less student tickets than adult tickets. The total is 625 tickets. So the student and adult tickets have to equal 625 when added.

Step-by-step explanation:

Student tickets: 275

Adult tickets: 350

Answer: 8

Step-by-step explanation:

2 To convert to a percent, multiply the decimal by 100.

8\times 100=800

8×100=800

800

800%

The correct answer is,

x = 13, 3

The empirical (68-95-99.7) rule, also known as the three-sigma rule or the standard deviation rule, applies to the bell-shaped distribution. we can estimate that the percentage of 1-mile-long roadways with potholes numbering between 32 and 65 is approximately 95%. is the answer.

The 68-95-99.7 rule gives a rough approximation of the percentage of data values that fall within certain distances from the mean. It states that approximately 68% of the data falls within one standard deviation of the mean, approximately 95% falls within two standard deviations, and approximately 99.7% falls within three standard deviations of the mean. In this question, the mean of the distribution is 43 and the standard deviation is 11.

To find the percentage of 1-mile-long roadways with potholes numbering between 32 and 65, we first need to determine how many standard deviations away from the mean these values are.

Using the formula for z-score (z = (x - µ) / σ), where x is the data value, µ is the mean, and σ is the standard deviation, we get: z for 32 = (32 - 43) / 11 = -1z for 65 = (65 - 43) / 11 = 2

Therefore, 32 is one standard deviation below the mean and 65 is two standard deviations above the mean.

Using the empirical rule, we know that approximately 68% of the data falls within one standard deviation of the mean, and approximately 95% falls within two standard deviations.

Since 32 is within one standard deviation below the mean and 65 is within two standard deviations above the mean, we can estimate that the percentage of 1-mile-long roadways with potholes numbering between 32 and 65 is approximately 68% + 95% = 163%.

However, since the values are outside the normal range, we cannot use the empirical rule to get an accurate percentage.

Therefore, we can estimate that the percentage of 1-mile-long roadways with potholes numbering between 32 and 65 is approximately 95%.

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For figure 4, The perimeter is 9 cm and the area is 3.5 square cm.

For figure 5, The circumference is 8π ft. and the area is 16π square ft.

For figure 6, The perimeter is 56 yards and the area is 196 square yards.

For figure 7, The perimeter is 12 cm and the area is 6 square cm.

What is the perimeter?

Perimeter is the distance measured around the edge of any geometrical shape.

The perimeter of a square having side "a" is = 4 ×a.

The perimeter of a triangle having sides "a", "b", and "c" is = a+b+c.

What is the Circumference of a circle?

In geometry, the circumference is the perimeter of a circle.

To find the circumference of a circle, we can use the formula.

                Circumference of a circle = 2×π×r

Where "r" is the radius of a circle.

What is the Area of a circle?

In geometry, the area of a circle is the space occupied by the circle.

To find the area of a circle having radius "r", we can use the formula.

                Area of a circle = π×r².

What is the Area of a triangle?

The area of a triangle is defined as the space enclosed within the three given sides of a triangle.

The formula for finding the area of a triangle for a given height "h" and base "b" is

                  Area of a Triangle = \(\frac{1}{2} *b *h\)

What is the area of a square?

The area of a square is defined as the space occupied by the square.

To find the area of a square having side "a" is

                  Area of a Square = (a)²

For figure 4,

The sides of the given triangle are 2.5 cm, 3 cm, and 3.5 cm.

The height of the triangle is given as 2 cm.

Then, the perimeter of a triangle = 2.5 + 3 + 3.5

                                                       = 9 cm.

and the area of a triangle \(=\frac{1}{2}*3.5*2\)

                                          = 3.5 square cm.

For figure 5,

The radius of the given circle is 4 ft.

so, the Circumference of a circle = 2×π×r

                                                       = 2×π×4

                                                       = 8π ft.

and the area of the circle = π×r²

                                          = π×(4)²

                                          = 16π square ft.

For figure 6,

The side of the given square is 14 yd.

so, the perimeter of a square = 4×side

                                                 = 4×14

                                                 = 56 yards.

and the area of a square = (side)²

                                          = (14)²

                                          = 196 square yards.

For figure 7,

The sides are 3 cm, 5 cm, and 4 cm.

so, the perimeter of a triangle = 3+5+4

                                                  = 12 cm.

The height of a triangle is 3 cm and the base is 4 cm.

and the area of a triangle = \(\frac{1}{2}\) × h × b

                                          = \(\frac{1}{2}\) × 3 × 4

                                          = 6 square cm.

Hence,

For figure 4, The perimeter is 9 cm and the area is 3.5 square cm.

For figure 5, The circumference is 8π ft. and the area is 16π square ft.

For figure 6, The perimeter is 56 yards and the area is 196 square yards.

For figure 7, The perimeter is 12 cm and the area is 6 square cm.

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The value constant b of the adiabatic expansion is -2.11

An adiabatic process is a process in which there is no exchange of heat from the system to its surroundings neither during expansion nor during compression

Given P = 32 kPa, dP/dt=16 kPa/min, V= 80 cm³, and dV/dt= 19 cm³/min

PVᵇ = C

Taking logs of both sides gives:

ln P + b ln V = ln C

Taking partial derivatives gives:

\(\frac{1}{P} \frac{∂P}{∂t} + \frac{b}{V}\frac{∂V}{∂t} = 0\)

Substitutituting the values  P, dP/dt, V and dV/dt into the derivative above:

1/32 x 16 +  b/80 x 19 = 0

1/2 + 19b/80 = 0

19b/80 = -1/2

19b -1/2 x 80

19b = -40

b = -40/19 = -2.11

Therefore, the value of  b is -2.11

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Reflection over the x-axis is represented by the transformation: (x, y) → (x, -y).

To perform a reflection over the x-axis, we need to flip the y-coordinate while keeping the x-coordinate unchanged. Let's go through the options given:

Option 1: (x, y) → (-x, y)

This transformation reflects the point over the y-axis, not the x-axis.

Option 2: (x, y) → (x, -y)

This transformation reflects the point over the x-axis, which is what we are looking for. The x-coordinate remains the same, and the y-coordinate is negated.

Option 3: (x, y) → (y, x)

This transformation swaps the x and y coordinates, representing a rotation of 90 degrees counterclockwise.

Option 4: (x, y) → (-y, x)

This transformation combines a reflection over the y-axis and a rotation of 90 degrees counterclockwise.

Therefore, the correct transformation representing a reflection over the x-axis is (x, y) → (x, -y).

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Answer:

\(\displaystyle m = 2\)

General Formulas and Concepts:

Algebra I

Step-by-step explanation:

Step 1: Define

Identify

Point (2, 1)

Point (4, 5)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

The correct answer is a)True  c)True The order of the cyclic group is determined by the number of elements in the group, whereas the order

a. True. If a nonempty subset H of a group G is closed under the binary operation of G, contains the identity element of G, and contains the inverse of each of its elements, then H is a subgroup of G.

c. A is true but B is false. Every cyclic group is indeed abelian, but the order of the cyclic group is not necessarily the same as the order of its generator. The order of the cyclic group is determined by the number of elements in the group, whereas the order of the generator refers to the smallest positive exponent that generates all elements of the group.

a. Zero has no inverse. In the set of real numbers under the usual multiplication operation, the element zero does not have a multiplicative inverse. Every nonzero real number has an inverse, but zero itself does not. In a group, every element should have an inverse, so the set of all real numbers under multiplication does not form a group.

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Answer:

48%

Step-by-step explanation:

there are 250 cars in total 50+70 is 120 (the red  or blue cars)

so there are 120 "yes" out of 250 total of 120 divided by 250 equal 0.48 or 48%

The z-score for Michelle's exam score of 56 is -3.4 (rounded to three decimal places). To calculate the z-score, we use the formula:

z = (x - μ) / σ

where:

- x is the individual score (56 in this case),

- μ is the mean of the population (73 in this case),

- σ is the standard deviation of the population (5 in this case).

Substituting the given values into the formula:

z = (56 - 73) / 5 = -17 / 5 = -3.4

Thus, the z-score for Michelle's exam score is -3.4.

The z-score measures the number of standard deviations an individual's score is away from the mean. In this case, Michelle's score of 56 is 17 points below the mean of 73. Since the standard deviation is 5, we divide the difference by the standard deviation to obtain the z-score. A negative z-score indicates that Michelle's score is below the mean. Therefore, her z-score is -3.4.

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The F statistic follows an F-distribution with (n-1) and (m-1) degrees of freedom. This distribution allows us to assess whether there is a significant difference between the variances of the two populations.

The question seems to be asking about the distribution of the F statistic when comparing the variances of two independent random samples.

Here is the answer: When comparing the variances of two independent random samples, the F statistic follows an F-distribution. In this case, if S1² and S2² are from independent random samples of size n and m respectively, taken from normal populations, then the F statistic is distributed as F with (n-1) and (m-1) degrees of freedom.

To understand why the F statistic follows an F-distribution, we need to consider the underlying theory. When comparing variances, we use the F statistic, which is calculated by dividing the sample variances (S1² and S2²) and taking the ratio of their respective degrees of freedom (n-1 and m-1).

The F-distribution is used because it is the ratio of two chi-squared distributions, which are themselves derived from normal distributions. The numerator chi-squared distribution represents the sum of squared deviations from the mean of the first sample, and the denominator chi-squared distribution represents the sum of squared deviations from the mean of the second sample.

The F-distribution is a right-skewed distribution, meaning it has a long right tail. This is because variances cannot be negative, and the F statistic is always positive. The shape of the F-distribution changes depending on the degrees of freedom, with higher degrees of freedom resulting in a more symmetrical distribution. In summary, when comparing variances of two independent random samples from normal populations, the F statistic follows an F-distribution with (n-1) and (m-1) degrees of freedom. This distribution allows us to assess whether there is a significant difference between the variances of the two populations.

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Answer:

1:   16

2:   27

4:   100

7:   1.728

10:   64

Just some of the answers

Step-by-step explanation:

Since the limit exists, the sequence converges, and the limit is 1/2.

To determine whether the sequence converges or diverges, we need to find its limit. We can rewrite the given sequence as (-1/2n - 3/2) + (2n/2n + 3/2), which simplifies to (-1/2) + (2n/2n + 3/2).

As n approaches infinity, the second term approaches 1, and the first term remains constant at -1/2. Therefore, the limit of the sequence as n approaches infinity is (-1/2) + 1 = 1/2.

To determine if the sequence converges or diverges, we'll examine the limit as n approaches infinity. The sequence is given by:

a_n = (-1)^n * (n^2 + 2n + 3)

Step 1: Divide the sequence by the highest power of n, which is n^2 in this case:

a_n = (-1)^n * (1 + 2/n + 3/n^2)

Step 2: Examine the limit as n approaches infinity:

lim (n→∞) a_n = lim (n→∞) [(-1)^n * (1 + 2/n + 3/n^2)]

Step 3: As n approaches infinity, the terms with n in the denominator approach 0:

lim (n→∞) (2/n) = 0
lim (n→∞) (3/n^2) = 0

So, we have:

lim (n→∞) a_n = lim (n→∞) [(-1)^n * (1 + 0 + 0)] = lim (n→∞) (-1)^n

Step 4: Determine whether the limit exists:

The limit of (-1)^n as n approaches infinity does not exist because it oscillates between -1 and 1. Therefore, the sequence diverges, and the  limit does not exist (DNE).

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Among the three options provided, the cross-sectional data set is the demographic data. Correct option is B).

Cross-sectional data refers to a type of data that captures information about different individuals, entities, or units at a specific point in time. It provides a snapshot of a population or sample at a particular moment, allowing for comparisons and analysis of various characteristics or variables. In the case of demographic data, it typically includes information about individuals' age, gender, education level, income, and other demographic attributes. This data set does not capture changes or trends over time but rather provides a snapshot of the population's characteristics at a specific time.

On the other hand, the BCAD data and links could refer to data related to building codes, regulations, and their corresponding references, while code cases may refer to specific instances or examples of code violations or compliance. These data sets may be specific to certain incidents or cases and do not necessarily capture information about a population or sample at a particular point in time, making them less likely to be considered cross-sectional data.

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