Help I will give brainliest

Answer:

Step-by-step explanation:

Add up the equations, it will eliminate x as variable:

Find the value of x:

Given : -

To find : -

Solution : -

3x + 6y = 18

-3x + 4y = 2 +

10y = 20

\( \: \)

3x + 6y = 18

3x + 6(2) = 18

3x + 12 = 18

3x = 18 - 12

3x = 6

\( \: \)

Answer:

above sea level

Step-by-step explanation:

Parallel programming can improve the performance of an application over sequential programming in certain cases, but it is not a guarantee.

Parallel programming allows for the use of multiple processors or cores to perform tasks simultaneously, which can improve the overall speed of an application. However, parallel programming can also introduce complexity and overhead, which can decrease performance. The potential for improved performance depends on the specific application and the design of the parallel implementation. Some applications may not benefit from parallel programming because they are not computationally intensive or because their data is not easily divided into parallelizable tasks. Additionally, the performance improvement also depends on the number of cores and the communication costs between them.

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Answer:

1.2

Step-by-step explanation:

0.75 :x :: 5: 8

0.75 / x = 5 / 8

Cross multiply

5x = 0.75 * 8

x = 6/5

x = 1.2

Answer:

Step-by-step explanation:

0.75 :x :: 5: 8

0.75 / x = 5 / 8  

5x = 0.75 * 8

x = 6/5

x = 1.2

Rounding to two decimal places, the confidence interval of the mean length of stay for patients who have had abdominal surgery is (5.03, 6.37).

To find the 95% confidence interval for the mean length of stay for patients with abdominal surgery, we can use the formula:

CI = \(\bar{X}\) ± Z * (σ / √n)

where:

CI = Confidence Interval

\(\bar{X}\) = Sample mean

Z = Z-score corresponding to the desired confidence level (95% confidence level corresponds to a Z-score of 1.96)

σ = Population standard deviation (since we don't have the population standard deviation, we'll use the sample standard deviation as an estimate)

n = Sample size

Given the information:

Sample mean (\(\bar{X}\)) = 5.7 days

Sample standard deviation (σ) = 1.6 days

Sample size (n) = 22

When the values are entered into the formula, we obtain:

CI = 5.7 ± 1.96 * (1.6 / √22)

Calculating this, we find:

CI = 5.7 ± 1.96 * (1.6 / 4.69)

CI = 5.7 ± 1.96 * 0.341

CI = 5.7 ± 0.668

Rounding to two decimal places, the confidence interval of the mean length of stay for patients who have had abdominal surgery is (5.03, 6.37).

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The average velocity of an object between two points can be determined by the following equation:
Average velocity = Δx/Δt
where Δx is the change in position or displacement of the object over the time interval Δt.

Here, the coordinate of an object is given as a function of time by x = -2 12t, where x is in meters and t is in seconds. Its average velocity over the interval from t = 1 to t = 6 s is calculated as follows:
Substituting t = 1 in the given equation x = -2 12t,x = -2 12(1) = -2 12 = -24 m
Substituting t = 6 in the given equation x = -2 12t,x = -2 12(6) = -2 72 = -144 m
Therefore, the change in position or displacement is given by Δx = (-144) - (-24) = -120 m. The time interval Δt between
t = 1 s and t = 6 s is given by Δt = 6 - 1 = 5 s. Therefore, the average velocity of the object over the time interval from t = 1 to t = 6 s is: Average velocity = Δx/Δt = (-120) / (5) = -24 m/s. The correct answer is -24.

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The value of 3BC - 2AB is a matrix obtained by performing scalar multiplication and matrix addition/subtraction. The solution to the given system of simultaneous equations is x = 2, y = -1, and z = -2.

A matrix multiplication is performed by multiplying the entries of one matrix by the corresponding entries of the other matrix and summing the results. To find the value of 3BC - 2AB, we first calculate the products 3BC and 2AB, and then subtract 2AB from 3BC.

The matrix BC is obtained by multiplying the matrix B by the matrix C:

BC =

[(−2)(−2) + (2)(−1) (−2)(1) + (2)(1) ]

[(1)(−2) + (3)(−1) (1)(1) + (3)(1) ]

Simplifying this expression gives us:

BC =

[2 0]

[-5 4]

Next, we calculate the product AB by multiplying the matrix A by the matrix B:

AB =

[(0)(−2) + (2)(1) (0)(2) + (2)(3) ]

[(1)(−2) + (−3)(1) (1)(2) + (−3)(3) ]

Simplifying this expression gives us:

AB =

[2 6]

[-5 -7]

Finally, we subtract 2AB from 3BC:

3BC - 2AB =

[3(2) - 2(2) 3(0) - 2(6) ]

[3(-5) - 2(-5) 3(4) - 2(-7) ]

Simplifying this expression gives us the final result:

3BC - 2AB =

[2 -12]

[-5 34]

Moving on to the second part of the question, to solve the given system of simultaneous equations, we can use the matrix method or any other appropriate method such as Gaussian elimination. Here, we'll use the matrix method.

We can represent the system of equations as a matrix equation AX = B, where:

A =

[1 2 -1]

[3 5 -1]

[-2 -1 -2]

X =

[x]

[y]

[z]

B =

[6]

[2]

[4]

To find X, we can solve the equation AX = B by multiplying both sides of the equation by the inverse of matrix A:

X =\(A^(-1) * B\)

Calculating the inverse of matrix A and multiplying it by B, we obtain:

X =

[2]

[-1]

[-2]

Therefore, the solution to the given system of simultaneous equations is x = 2, y = -1, and z = -2

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Answerpizza:

Step-by-step explanation:

Answer:

rectangle

6 faces

12 edges

8 vertices

10ft height

hope this helps

Step-by-step explanation:

a = 2 + 3a + 8

a = 10 + 3a

a - 3a = 10

-2a = 10

a = -5

1. The outcomes in the sample space of choosing a letter from the word STARK are: S, T, A, R, K.

2. Number of outcomes in the sample space = 6 (from THANKS) × 5 (from STARK) = 30.

3. The Probability of choosing the letters AA is 0, as there are no occurrences of the letter A in both words together.

1. The outcomes in the sample space of choosing a letter from the word THANKS are: T, H, A, N, K, S.

  The outcomes in the sample space of choosing a letter from the word STARK are: S, T, A, R, K.

2. To find the number of outcomes in the sample space, we multiply the number of outcomes for each word.

  Number of outcomes in the sample space = Number of outcomes for the first word × Number of outcomes for the second word

  Number of outcomes in the sample space = 6 (from THANKS) × 5 (from STARK) = 30.

3. The probability of choosing the letters AA would be the number of favorable outcomes (which is 0 in this case) divided by the total number of outcomes in the sample space.

  Probability of choosing AA = Number of favorable outcomes / Total number of outcomes

  Probability of choosing AA = 0 / 30 = 0.

Therefore, the probability of choosing the letters AA is 0, as there are no occurrences of the letter A in both words together.

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Answer:

$1425

Step-by-step explanation:

To find how much money you would make, we would first have to multiply the number of weeks worked by how many hours you work per week.

4 · 25 = 100

What this tells us is that in 4 weeks, you worked 100 hours in total. Now we can multiply total hours worked by how much you are paid per hour to get our answer.

14.25 · 100 = 1425

A random variable is a variable that takes on values that are uncertain or probabilistic in nature.

Therefore, the correct option is a) A variable that takes on values that are uncertain.

Random variables can be discrete, meaning they can only take on specific values, or continuous, meaning they can take on any value within a certain range.

These variables are commonly used in statistical analyses and probability theory to model various phenomena, such as the outcome of a dice roll or the height of individuals in a population.

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Answer: 521

Step-by-step explanation:

34907/67=521

The area of the triangle formed by the given sides is 9√2 square units.

To find the area of the triangle, we first need to find the length of the third side, ~u - ~v.

~u - ~v = 〈3, 3, 3〉 - 〈6, 0, 6〉 = 〈-3, 3, -3〉

Next, we can use the formula for the area of a triangle given the lengths of its sides:

Area = 1/4 * √(4a²b² - (a² + b² - c²)²)

where a, b, and c are the lengths of the sides.

Using this formula with the lengths of the sides ~u, ~v, and ~u - ~v, we get:

a = ||~u|| = √(3² + 3² + 3²) = 3√3

b = ||~v|| = √(6² + 0² + 6²) = 6√2

c = ||~u - ~v|| = √((-3)² + 3² + (-3)²) = 3√2

Plugging these values into the formula, we get:

Area = 1/4 * √(4(3√3)²(6√2)² - (3√3)² - (6√2)² - (3√2)²)

= 9√2

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Answer: the common difference is 4

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

the answer is B.the equation of the line

The coin is flipped at least 52 times in order to obtain a 99% confidence interval of width of at most . 18 for the probability of flipping a head.

Hence, Option F is correct answer.

In a sample with a number n of people surveyed with a probability of a success of π , and a confidence level of (1-α), we have the following confidence interval of proportions.

\(\pi\) ± z\(\sqrt{\frac{\pi \p(1-\pi )}{n} }\)

z is the z-score that has a pvalue of \(1-\frac{\alpha }{2}\)

Since, the coin is fair, so \(\pi =0.5\).

The margin of error is:

\(M=z\sqrt{(\frac{\pi (1-\pi )}{n} )}\)

99% confidence level:

So \(\alpha =0.01\) ,z is the value of Z that has a p value of 1-\(\frac{0.01}{2}\)=0.995,

so Z= 2.575

We have to flip the coin in order to obtain a 99% confidence interval of width of at most 18 for the probability of flipping a head at least n times.

n is found when M=0.18 .

So

M=\(z\sqrt{\frac{\pi (1-\pi )}{n} }\)

\(0.18=2.575\sqrt{\frac{0.5*0.5}{n} }\)

\(0.18\sqrt{n} =2.575*0.5\)

\(\sqrt{n}=\frac{2.575*0.5}{0.18}\)

\(\sqrt{n} ^{2} =(\frac{2.575*0.5}{0.18} )^{2}\)

n = 51.16

Thus, we have to flip the coin at least 52 times.

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The possible solution is 12 cats and 4 dogs in Sarah's store.

Let x represent the number of cats and y represent the number of dogs.

Since Sarah's Pet Store never has more than a combined total of 16 cats and dogs. Hence:

Also, She also never has more than 9 cats. Therefore:

The solution to the inequality is graphed. From the graph, the possible solution is 12 cats and 4 dogs

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Hence, the slope which is perpendicular to the line to \(y = -x - 18\) and passes through \((-6, 11)\) is \(y=x+17\).

What is the equation?

The definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.

Here given that,

The line in slope-intercept form that is perpendicular to \(y = -x - 18\) and passes through \((-6, 11)\).

As we know the slope of line is

\(y=mx+c\)

where \(m\) is the slope and \(c\) is the y intercept.

Given points are \((-6,11)\).

If we want to describe the perpendicular line to the original line then the slope of line is

\(m_2=-\frac{1}{m_1}\)

In our given slope of line

\(y = -x -18\)

where \(m_1=-1\)

So,

\(m_2=-\frac{1}{m_1}\\\\m_2=-\frac{1}{-1}\\\\m_2=1\)

Now for the slope of second line we use the point slope from the construct equation then,

\(y-y_1=m_2(x-x_1)\\\\y-11=1(x-(-6))\\\\y-11=x+6\\\\y=x+6+11\\\\y=x+17\)

Hence, the slope which is perpendicular to the line to \(y = -x - 18\) and passes through \((-6, 11)\) is \(y=x+17\).

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32 g/mol grams of oxygen are held in a 2.00L container at a temperature of 270K and a pressure of 38.0 psi.

We need to use the ideal gas law equation.

The ideal gas law equation is PV = nRT, where P represents pressure, V represents volume, n represents the number of moles of gas, R is the ideal gas constant, and T represents temperature. To find the number of moles of oxygen, we rearrange the equation to n = PV / RT.

First, we need to convert the pressure from psi to atmospheres, as the ideal gas constant is typically given in terms of atm. 1 atmosphere is approximately equal to 14.7 psi, so 38.0 psi is approximately 2.59 atmospheres. Next, we convert the volume from liters to moles using the ideal gas constant, R. The value of R is 0.0821 L·atm/(mol·K).

Using the given values, we can now calculate the number of moles of oxygen. Plugging the values into the equation, we have n = (2.59 atm) * (2.00 L) / (0.0821 L·atm/(mol·K) * 270K). This calculation gives us the number of moles of oxygen in the container.

To convert this to grams, we multiply the number of moles by the molar mass of oxygen, which is approximately 32 g/mol.

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Answer:

This is a function and there is no value of x for which we will get two or more different values of y.

Step-by-step explanation:

Now, this is a function and there is no value of x for which we will get two or more different values of y

The equation is y = 2x

bye

Answer:

11.4 gallons

Step-by-step explanation:

Divide 28.5 by 5 then multiply by 2:

(28.5 ÷ 5) x 2 = 5.7 x 2 = 11.4

the probability that the hospital stay of children not wearing any restraints is from 5 to 6 days is 0.10031, or about 10.03%.

To find the probability that the hospital stay of children not wearing any restraints is from 5 to 6 days, we need to standardize the interval by subtracting the mean and dividing by the standard deviation. Let X denote the hospital stay of a child not wearing any restraints, then we have:

Z = (X - μ) / σ

where μ = 7.37 and σ = 2.60.

To find the probability that X is from 5 to 6 days, we standardize the endpoints:

Z1 = (5 - 7.37) / 2.60 = -0.91
Z2 = (6 - 7.37) / 2.60 = -0.52

Using a standard normal table or a calculator, we can find the area under the standard normal curve between Z1 and Z2:

P(-0.91 < Z < -0.52) = 0.10031 (rounded to five decimal places)

Therefore, the probability that the hospital stay of children not wearing any restraints is from 5 to 6 days is 0.10031, or about 10.03%.

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Answer:

equilateral acute

Step-by-step explanation:

equilateral-- all the sides have the same length

acute-- all the angles are below 90 degree

Answer:

Step-by-step explanation:

You'r answer should be an equilateral acute.

Answer:

the correct answer is option D

Answer:

The area of the given circle is,

\(A = 5819/350 cm^2 = 16.6257 cm^2\)

Step-by-step explanation:

Here, 4.6 cm is the diameter, d =4.6 cm

so, since the radius is d/2, we have,

r = 4.6/2 = 2.3

r = 2.3 cm

Now, the formula for area of a circle is,

A = π(r)^2 = π(r)(r)

Using 2.3 cm for r and 22/7 for π, we get,

\(A = \pi r^2\\A = (22/7)(2.3)^2\\\\A = 5819/350 cm^2 = 16.6257 cm^2\)

Hence we have found the area

The function of the town's population is an exponential growth

From the question, we have the following parameters that can be used in our computation:

Initial population = 3800

Growth  rate = 2% every year

From the above, we understand that

There is a growth in the population by 2% every year

Using the above as a guide, we have the following:

This means that the function is an exponential growth

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