There's a question I've been trying for 2 days to get solved but either I'm missing something or maybe I haven't been using the right method but I hope someone will help me here. ________________________________________

Substitution, Manipulation, Elimination

Solve Simultaneously. Use the method you find easiest. (title of the question)

________________________________________

4x-3y=11

5x-9y=-2

Answer:use calculator to divide the variables and use the countains as a providence

Step-by-step explanation:

Answer:

a. False

b. False

c. False

d. True

Step-by-step explanation:

a. 4.25 x 10⁶ = 425,000 (false) should be 4,250,000

b. 6.38 x 10⁹ = 638,000,000,000 (false) should be 6,380,000,000

c. 5.11 x 10⁻² = 511 (false) should be 0.0511

d. 2.79 x 10⁻⁴ =  0.000279  (true)

Answer:

True

False

False

True

Step-by-step explanation:

Based on the given information, there is convincing evidence of a difference in the proportions of households with and without school-aged children that would support starting the school year a week earlier.

Based on the 90% confidence interval given, which ranges from 0.03 to 0.36, there is convincing evidence of a difference in the true proportions of households that would support starting the school year a week earlier, between those with school-aged children and those without. This is because the interval does not include 0, which suggests that the difference is statistically significant. However, it's important to note that this conclusion is based on the specific confidence level of 90%. If a different confidence level was used, the interval could potentially contain 0, indicating that there may not be a significant difference. Therefore, it's important to consider the level of confidence when interpreting the results. Additionally, the fact that different sample sizes were used could potentially impact the validity of the results. It's generally preferred to have equal sample sizes in order to increase the accuracy of the comparison. However, in this case, the difference in sample sizes does not necessarily invalidate the results, but it should still be taken into consideration.

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A discrete random variable may take on only a countable number of distinct values such as 0,1,2,3,4,...

Discrete random variables are usually (but not necessarily) counts. If a random variable can take only a finite number of distinct values, then it must be discrete. Examples of discrete random variables include the number of children in a family, the Friday night attendance at a cinema, the number of patients in a doctor's surgery, and the number of defective light bulbs in a box of ten.

The probability distribution of a discrete random variable is a list of probabilities associated with each of its possible values. It is also sometimes called the probability function or the probability mass function.

Example'

The cumulative distribution function for the above probability distribution is calculated as follows:

The probability that \(X\) is less than or equal to is 0.1,

the probability that \(X\) is less than or equal to 2 is 0.1+0.3 = 0.4,

the probability that \(X\) is less than or equal to 3 is 0.1+0.3+0.4 = 0.8, and

the probability that \(X\) is less than or equal to 4 is 0.1+0.3+0.4+0.2 = 1.

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if the matrix is invertible.22. \(\left( {\begin{aligned}{*{20}{c}}5&1&{ - 1}\\1&{ - 3}&{ - 2}\\0&5&3\end{aligned}} \right)\) then,  the determinant of the matrix A is -3 (non-zero), the matrix is invertible.

To determine if a matrix is invertible, we need to find its determinant. If the determinant is non-zero, the matrix is invertible. Let's calculate the determinant for the given matrix:

Matrix A = \(\begin{pmatrix} 5 & 1 & -1 \\ 1 & -3 & -2 \\ 0 & 5 & 3 \end{pmatrix}\)

Step 1: Use the first row for cofactor expansion:

Determinant(A) = 5 × Cofactor(1,1) - 1 × Cofactor(1,2) + (-1) × Cofactor(1,3)

Step 2: Calculate the cofactors:

Cofactor(1,1) = Determinant of the 2x2 matrix obtained by removing the first row and first column:

\(\begin{pmatrix} -3 & -2 \\ 5 & 3 \end{pmatrix}\)

Cofactor(1,1) = (-3)(3) - (-2)(5) = -9 + 10 = 1

Cofactor(1,2) = Determinant of the 2x2 matrix obtained by removing the first row and second column:

\(\begin{pmatrix} 1 & -2 \\ 0 & 3 \end{pmatrix}\)

Cofactor(1,2) = (1)(3) - (-2)(0) = 3

Cofactor(1,3) = Determinant of the 2x2 matrix obtained by removing the first row and third column:

\(\begin{pmatrix} 1 & -3 \\ 0 & 5 \end{pmatrix}\)

Cofactor(1,3) = (1)(5) - (-3)(0) = 5

Step 3: Substitute the cofactors back into the formula for Determinant(A):

Determinant(A) = 5 × 1 - 1 × 3 + (-1) × 5 = 5 - 3 - 5 = -3

Since the determinant of the matrix A is -3 (non-zero), the matrix is invertible.

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Answer:

7 red marbles

Step-by-step explanation:

P( red) = red marbles / total marbles = 1/8

We know there are 56 marbles

red marbles/56 = 1/8

Multiply by 56

red marbles = 1/8 *56 = 7

There are 7 red marbles

Answer:

12.8

Step-by-step explanation:

8÷5/8 is also the same as:

8 x 1/5 x 8

Proof:

The scatterplot with the least squares line provides insights into the relationship between average annual global surface temperature and the years from 2000 to 2015, allowing us to assess trends, strength of correlation, and make predictions within certain limitations.

The scatterplot represents the relationship between the average annual global surface temperature, in degrees Celsius, and the corresponding years from 2000 to 2015. The line drawn on the plot is the least squares line, which is the best fit line that minimizes the overall distance between the observed data points and the line.

The least squares line is determined using a statistical method called linear regression. It calculates the equation of a straight line that represents the trend in the data. This line serves as a mathematical model to estimate the average temperature based on the year.

By analyzing the scatterplot and the least squares line, we can make several observations. Firstly, we can see whether the temperature has been increasing, decreasing, or remaining relatively stable over the given years. If the slope of the line is positive, it indicates a positive correlation, implying that the temperature has been increasing. Conversely, a negative slope suggests a decreasing trend.

Additionally, we can evaluate the strength of the relationship between temperature and time by examining how closely the data points cluster around the line. If the points are closely grouped around the line, it suggests a strong correlation, indicating that the line is a good representation of the data. On the other hand, if the points are more scattered, the correlation may be weaker.

Furthermore, the line can be used to predict the average annual global surface temperature for future years beyond the data range of 2000 to 2015. However, it's important to note that such predictions should be made with caution and considering other factors that may affect global temperatures, such as climate change and natural variability.

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Question

The given scatterplot shows the average annual global surface temperature, in degrees celsius, for each year from 2000 to 2015. the line drawn is the least squares line for the data set.

The rotation of the triangle that's illustrated will be a rotation of 90°.

It should be noted that transformation is a general term for 4 specific ways that can be used to manipulate the shape and the position of a point, line, or a geometric figure. In such a case, the original shape of the object is called the pre-Image while the final shape and the position of the object is simply the image under transformation.

There are typically four common types of transformations and they're translation, rotation, reflection, as well as dilation. It should be noted that rotation about simply illustrates the transformation that takes place regarding the triangle.

For rotation, the shape rotates or turns the pre-image around the axis and there'll be no change in the size or shape of the object.

Here, the counterclockwise rotation was illustrated in the triangle ABC. Therefore, the rotation of the triangle that's illustrated will be a rotation of 90°.

In conclusion, based on the information given, the correct option is A.

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Complete question:

Triangle ABCTriangle ABC is rotated to form △A'B'C' .

The coordinates of point A are (1, 1) , the coordinates of point B are (3, 1) , and the coordinates of point C are (1, 4) .

Which countr clockwise rotation around the origin results in the transformation of △ABC to △A'B'C' ?

Select from the drop down arrow to choose the correct rotation.

(a) rotation of 90

(b) rotation of 180

(c) rotation of 360

In the given circle the length of the chord marked x is

We know that the length of the chord is bisected by the perpendicular from the center of the circle.

Therefore the length of the chord is 7 × 2 = 14 units.

Again from the chord properties of a circle we know that, chords that are equidistant from the center are equal.

Since both the chords are at a distance of 9 units hence both chord lengths

Hence the length of the other chord = 14 units.

∴ x = 14

The segment of a line that joins any two points on a circle's circumference is known as the chord. It must be emphasized that its longest chord is its diameter, which runs through the center of the circle.

The circle and its chord are depicted in the diagram below. In the center of the circle, equal-length chords subtend equal angles.

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Answer:

True

Step-by-step explanation:

Linear equations are often used to model the relationship between the dependent variable that is affected by changes in the independent variable.  

For instance, the linear function: f(x) = 2x + 3, where f(x) is the output (dependent variable) depends on the value of the input, x (independent variable).  

Therefore, the correct answer is True.      

Answer:

7 children have brown eyes

Step-by-step explanation:

20*.35=7

Answer:

7 children have brown eyes

Step-by-step explanation:

can i get brainliest please?

The circumference of the circle with a radius of 6 feet would be approximately 37.7 feet.

The circumference of a circle is the distance around the outer edge of the circle. It is the perimeter of the circle, which is the total length of the boundary that encloses the area of the circle.

The formula for the circumference of a circle is

C = 2πr

Where C is the circumference, r is the radius, and π is approximately 3.14.

If a circle has a radius of 3 feet, the circumference would be

C = 2πr

C = 2π(3)

C ≈ 18.85 feet

When the radius doubles to 6 feet, the circumference would be

C = 2πr

C = 2π(6)

C ≈ 37.7 feet

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Answer:

double, and 36

Step-by-step explanation:

Mc graw hill

Q...

Answer:

The circumference is 62.8.

Step-by-step explanation:

Answer:

-120

Step-by-step explanation:

Answer:

YOUR ANSWER SHOULD BE -120

Step-by-step explanation:

heres why

becuase i said so

and we already asume its at 0 so if u go 120- 0 what do u get u get -120

so thats why

Answer: An adult’s ticket costs $9 while a children’s ticket costs $5.

Step-by-step explanation:

1). 2x + 3y = 33

2). 5x + 2y = 55

3). I’m going to use substitution.

Isolate a variable (x):

2x + 3y = 33

2x = -3y + 33

X = (-3y + 33)/2

X = -3/2y + 33/2

Substitute and solve for y:

5x + 2y = 55

5(-3/2y + 33/2) + 2y = 55

-15/2y + 165/2 + 2y = 55

-11/2y = -55/2

Y = 5 <— children’s ticket.

Solve for x:

2x + 3y = 33

2x + 3(5) = 33

2x + 15 = 33

2x = 18

X = 9 <— adult’s ticket.

Check:

5x + 2y = 55

5(9) + 2(5) = 55

45 + 10 = 55

55 = 55

2x + 3y = 33

2(9) + 3(5) = 33

18 + 15 = 33

33 = 33

Answer:

see explanation

Step-by-step explanation:

Given f(x) then the derivative f'(x) is

f'(x) = lim( h tends to 0 ) \(\frac{f(x+h)-f(x)}{h}\)

      = lim( h to 0 )\(\frac{x+h+\frac{1}{x+h }-(x+\frac{1}{x} ) }{h}\)

      = lim(h to 0) \(\frac{x+h+\frac{1}{x+h}-x-\frac{1}{x} }{h}\)

      = (lim(h to 0) \(\frac{h+\frac{1}{x+h}-\frac{1}{x} }{h}\)

      = lim( h to 0 ) \(\frac{hx(x+h)+x-(x+h)}{hx(x+h)}\)

      = lim( h to 0 ) \(\frac{hx(x+h)+x-x-h}{hx(x+h)}\)

      = lim(h to 0 ) \(\frac{hx(x+h)}{hx(x+h)}\) - \(\frac{h}{hx(x+h)}\)

Cancel the numerator/denominator of first fraction and h in the second

= lim ( h to 0 ) 1 - \(\frac{1}{x(x+h)}\) ( let h go to zero ), then

f'(x) = 1 - \(\frac{1}{x^2}\)

Ratio is the relation between two amounts that shows the number of times one value contains within the other.

What is Ratio?

A ratio in mathematics illustrates how many times one number contains another. For example, if a dish of vegetables contains eight tomato and six carrots, the tomato-to-carrot ratio is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Similarly, the proportion of carrots to tomato is 6:8 (or 3:4), while the proportion of tomato to overall fruit is 8:14. (or 4:7). A ratio's numbers can be any quantity, such as a count of persons or things, or measures of lengths, weights, time, and so forth. In most situations, both numbers must be positive.

Solution:

Ratio is the relation between two amounts that shows the number of times one value contains within the other.

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Answer:

If S is some point that lies between R and T, then addition RS and ST should equal RT

y = 4, RS = 27, ST = 17

RS = 6y + 3

ST = 3y + 5

RT = 44

RS + ST = RT

6y + 3 + 3y + 5 = 44

9y + 8 = 44

Combine like terms

9y = 44 - 8

Subtract 8 from both sides of the equation

9y = 36

Divide both sides of the equation by 9

y = 36/9

y = 4

Now substitute the y value in the original equation to find RS and ST

I got 27 and 17 respectively

Step-by-step explanation:

Reverse logistics management can be more challenging than the management of more typical supply chain flows. In reverse logistics, the flow of products goes in the opposite direction compared to traditional forward logistics.

It involves activities such as product returns, repairs, refurbishment, recycling, and disposal. This adds complexity to the supply chain as it requires effective coordination and management of multiple processes, including product collection, sorting, inspection, and redistribution.

There are several reasons why reverse logistics management can be more difficult. First, there is often a lack of visibility and control over the flow of returned products, which can result in inefficiencies and increased costs. Second, the nature of reverse logistics operations is typically more unpredictable and variable compared to forward logistics. Third, managing customer expectations and satisfaction during the return process is crucial, as it directly impacts customer loyalty and brand reputation.

In conclusion, reverse logistics management presents unique challenges compared to traditional supply chain flows. It requires careful planning, effective coordination, and a focus on customer satisfaction to ensure efficient and cost-effective handling of returned products. Organizations need to develop robust processes and systems to effectively manage reverse logistics and optimize their supply chain performance.

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To prove that y^n = θ(n^y) for any real constants x and y, where y > 0, we need to show that y^n is both O(n^y) and Ω(n^y).

To show that y^n = O(n^y), we need to find a positive constant C and a value of n_0 such that for all n ≥ n_0, we have y^n ≤ Cn^y. We can rewrite this inequality as n^(ylog(y)) ≤ Cn^y. If we choose C = y^(y+1) and n_0 = 1, then for all n ≥ n_0, we have:

n^(ylog(y)) = n^(log(y^n)) = y^n ≤ y^(y+1) * n^y = Cn^y.

Thus, y^n = O(n^y).

To show that y^n = Ω(n^y), we need to find a positive constant C and a value of n_0 such that for all n ≥ n_0, we have y^n ≥ Cn^y. We can rewrite this inequality as (y/n)^n ≥ C. Since y > 0 and n ≥ 1, we have y/n ≥ 1, which implies (y/n)^n ≥ 1^n = 1. If we choose C = 1 and n_0 = 1, then for all n ≥ n_0, we have:

(y/n)^n ≥ 1.

Thus, y^n = Ω(n^y).

Since we have shown that y^n = O(n^y) and y^n = Ω(n^y), we can conclude that y^n = θ(n^y). Therefore, the statement is proved.

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Answer:.36 cent

1Step-by-step explanation:1.80 divided by 5

Answer :

y = \(\frac{2}{5} ( x - 3)\)

Step-by-step explanation:

6 + 5y = 2x

or, 5y + 6 - 6 = 2x - 6

or, 5y = 2x - 6

or, 5/5 y = 2 ( x - 3) / 5

or, y = 2/5 ( x - 3)

therefore, y = \(\frac{2}{5} ( x - 3 )\)

Answer:

D. Tails

Step-by-step explanation:

Answer:

6: (0,9)

7: ( -10, -3)

8: (-12,9)

9: (2,0)

Step-by-step explanation:

Answer:

Step-by-step explanation:

All but first for every single x gives single y so the second, third and fourth are function

At first for x=2 we have two y (2 or -2) so this isn't function.

Avery interpreting the Probability is wrong because 0.40 represents probability in the long run over many visits to the site

Probability: The chance that a given event will occur. The ratio of the number of outcomes in an exhaustive set of equally likely outcomes that produce a given event to the total number of possible outcomes

given that the probability that a randomly selected visitor to a certain website will be asked to participate in an online survey is 0. 40

Avery claims that for the next 5 visitors to the site, 2 will be asked to participate in the survey

Avery interpreting the Probability is wrong because 0.40 represents probability in the long run over many visits to the site

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Answer:

Because 0.40 represents likelihood over many visits to the site in the long term, Avery's interpretation of the probability is incorrect.

Step-by-step explanation:

What does the term probability mean?

Probability: The likelihood that a specific occurrence will take place. the proportion between the total number of conceivable outcomes and the number of outcomes in a comprehensive collection of equally likely outcomes that result in a specific event

Given that there is a 0. 40 percent chance that a randomly chosen website visitor will be requested to take an online survey

Avery asserts that of the following 5 site visits, 2 will be required to complete the survey.

Because 0.40 represents chance over the long term and several visits to the site, Avery's interpretation of the probability is incorrect.

The answer is

m = 4

Have a great day!!!

Answer:

4 is the slope

Step-by-step explanation:

We know this by using the slop formula, which is y2-y1/x2-x1

We just plug in the points that we know and solve from there,

Give brainliest please :3

Answer:

the largest angle is 70

Step-by-step explanation:

180 degrees in a triangle

180=5x+6x+7x

simplify

180=18x

x=10

7x=70

the largest angle is 70 degrees.