What is the solution of the following system 5x+2y+z=4 x+2z=4 2x+y-z=-1

Answer:

k=12

Step-by-step explanation:

hope this helps :))

5 is the y intercept.

-Always the number without the variable.

a. The missing probability value is 0.4.

b. E(X) = 1.4.

c. Var(X) = 0.56 and σx = 0.75.

d. E(Z) = 2.27, Var(Z) = 2.56, and σz = 1.60.

The given probability distribution of the random variable X shows the probabilities associated with each possible outcome. To find the missing probability value, we know that the sum of all probabilities must equal 1. Therefore, the missing probability can be calculated by subtracting the sum of the probabilities already given from 1. In this case, 0.1 + 0.2 + 0.3 = 0.6, so the missing probability value is 1 - 0.6 = 0.4.

To find the expected value or mean of X (E(X)), we multiply each value of X by its corresponding probability and then sum up the results. In this case, (0 * 0.1) + (1 * 0.2) + (2 * 0.3) + (3 * 0.4) = 0.4 + 0.2 + 0.6 + 1.2 = 1.4.

To calculate the variance (Var(X)) of X, we use the formula: Var(X) = Σ[(X - E(X))^2 * P(X)], where Σ denotes the sum over all values of X. The standard deviation (σx) is the square root of the variance. Using this formula, we find Var(X) = [(0 - 1.4)² * 0.1] + [(1 - 1.4)^2 * 0.2] + [(2 - 1.4)² * 0.3] + [(3 - 1.4)² * 0.4] = 0.56. Taking the square root, we get σx = √(0.56) ≈ 0.75.

Now, let's consider the new random variable Z = 1 + (2/3)X. To find E(Z), we substitute the values of X into the formula and calculate the expected value. E(Z) = 1 + (2/3)E(X) = 1 + (2/3) * 1.4 = 2.27.

To calculate Var(Z), we use the formula Var(Z) = (2/3)² * Var(X). Substituting the known values, Var(Z) = (2/3)² * 0.56 = 2.56.

Finally, the standard deviation of Z (σz) is the square root of Var(Z). Therefore, σz = √(2.56) = 1.60.

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Answer:

a) 3/4

b) 3/4

c) 3/4

Explanation:

a) There are 8 equal sections total, and only 6 of them are shaded. If you simplify 6/8 then you get 3/4.

b) There are 12 equal sections total, and only 9 of them are shaded. If you simplify 9/12 then you get 3/4.

c) There are 4 equal sections total, and only 3 of them are shaded. 3/4 is already simplified.

Answer:

a)3/4(originally 6/8)

b)3/4(originally 9/12)

c) 3/4

Answer:

- 5, 3, 11, 19, 27, 35

Step-by-step explanation:

Using the recursive rule and a₁ = - 5

a₂ = a₁ + 8 = - 5 + 8 = 3

a₃ = a₂ + 8 = 3 + 8 = 11

a₄ = a₃ + 8 = 11 + 8 = 19

a₅ = a₄ + 8 = 19 + 8 = 27

a₆ = a₅ + 8 = 27 + 8 = 35

The first six terms are - 5, 3, 11, 19, 27, 35

Therefore , the solution of the given problem of graph comes out to be (0,29) and (0,5).

Graphs are used by academics to logically depict or chart events or values visually. A graph point often depicts the relationship between two or more things. The non-linear storage structure known as a graph is made up of nodes, often referred to as vertices, and edges. Glue ought to be used to join the nodes, also known as vertices. In this graph, the vertex numbers are 1, 2, 3, or 5, whereas the edge numbers were 1, 2, 1, 3, 2, 4, etc (2.5). (3.5). (4.5). (4.5). graphics that graphically represent exponential growth in statistical diagrams like line graphs, charts, and bar graphs. a logarithmic graph with a triangle form

Here,

Given :

=>  y=(x-5)²+4

So,

x =0

then y value :

=> y = (0-5)² +4

=> y = 25 +4

=> y = 29

=> (0,29)

and

=>  y=2x²+8x+5

So,

x = 0 ,

then y value :

=> y = 2(0)² + 8(0) + 5

=> y = 5

=> (0,5)

Therefore , the solution of the given problem of graph comes out to be (0,29) and (0,5).

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Answer:

24 ft^2

Step-by-step explanation:

The small aquarium:

1 * 3 * 2 = 6 ft^2

The large aquarium

(1 + 1) * (3 + 2) * (2 + 1)

2 * 5 * 3 = 30 ft^2

Difference between the larger aquarium and the smaller aquarium:

30 - 6, or 24.

This means that the answer to this question is a, 24 ft^2

Answer:

Wheres the question I need it

By using function, it can be concluded that-

The predictor variables are bed, bath, floor

What is function?

A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.

There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.

In a function y = f(x), x is the independent variable and y is the dependent variable.

The price of an apartment is dependent on the number of bedrooms, bathrooms and the floor of the apartment

So the required function is p = f(bed, bath, floor) where p is the price of the apartment

The predictor variables are bed, bath, floor

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In order to pull a 2-cm nail with a resistance of 1500 N out of a piece of wood, a carpenter exerted a force of 250 N using a claw hammer. The amount of work done by the carpenter to pull out the nail can be calculated using the formula W = F x d.

The work done by the carpenter to pull out the nail can be calculated using the formula W = F x d, where W is work, F is force, and d is distance. In this case, the carpenter exerted a force of 250 N to pull the nail out of the wood, and the nail traveled a distance of 2 cm. To use this formula, we need to convert the distance into meters, which gives us 0.02 m. Plugging in the values, we get W = 250 N x 0.02 m = 5 J.

This calculation tells us that the carpenter did 5 Joules of work to remove the nail. This work was necessary to overcome the resistance of the nail, which was 1500 N. Without the application of sufficient force, the nail would not have budged from its position in the wood. The carpenter's claw hammer provided the necessary force to extract the nail, and the amount of work done was directly proportional to the amount of force exerted and the distance the nail traveled. In this case, the carpenter was able to apply sufficient force to pull the nail out of the wood and complete the task at hand.

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Answer: C. 53 million

Step-by-step explanation:

Answer:

C or 53million

Step-by-step explanation:

A randomization test with 10,000 randomizations found that the absolute difference between group means was greater than or equal to 2 mm in 490 of the randomizations. We can conclude that there was a marginally significant difference between groups (p = 0.049).

Randomization tests are used to examine the null hypothesis that two populations have similar characteristics. The hypothesis testing approach used in statistics is a formal method of decision-making based on data. In hypothesis testing, a null hypothesis and an alternative hypothesis are used to determine if the results of the data support the null hypothesis or the alternative hypothesis. A p-value is calculated and compared to a significance level (usually 0.05) to determine whether the null hypothesis should be rejected or not. In this scenario, the difference in mean size between shells taken from sheltered and exposed reefs was found to be 2 mm. A randomization test with 10,000 randomizations found that the absolute difference between group means was greater than or equal to 2 mm in 490 of the randomizations. Since the number of randomizations in which the absolute difference between group means was greater than or equal to 2 mm was less than the significance level (0.05), we can conclude that there was a marginally significant difference between groups (p = 0.049).

We can conclude that there was a marginally significant difference between groups (p = 0.049).

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We can reject the null hypothesis and conclude that there is a marginally significant difference between groups (p = 0.049)

To solve this problem, we need to perform a hypothesis test where:

Null Hypothesis, H0: There is no difference between the two groups.

Alternate Hypothesis, H1: There is a difference between the two groups.

Here, the mean difference between the two groups is given to be 2 mm. Also, we are given that 490 out of 10000 randomizations have an absolute difference between group means of 2 mm or more.

The p-value can be calculated by the following formula:

p-value = (number of randomizations with an absolute difference between group means of 2 mm or more) / (total number of randomizations)

Substituting the given values in the above formula, we get:

p-value = 490 / 10000p-value = 0.049

Therefore, the p-value is 0.049 which is less than 0.05. Hence, we can reject the null hypothesis and conclude that there is a marginally significant difference between groups (p = 0.049).

The correct option is (e) There was a marginally significant difference between groups (p = 0.049).

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Overall, equations provide a mathematical representation and understanding of relationships, while tables present data points in a structured format.

When comparing an equation and a table, you can examine their characteristics, purpose, and the information they provide. Here are some points to consider when making comparisons:

Representation:

An equation represents a mathematical relationship between variables using symbols and mathematical operations. A table presents data or values in a structured format, typically organized into rows and columns.

Communication of Information:

Equations provide a concise and general representation of a relationship, allowing for predictions, calculations, and modeling. Tables present specific data points or values, providing a visual representation of how variables are related or how they change.

Variables:

Equations involve variables, which can be manipulated to explore different scenarios and analyze the relationship between quantities. Tables display specific values or data points for variables, showing how they vary or are related based on the given information.

Visualization:

Equations can express relationships symbolically and provide a mathematical understanding, but they may not offer a visual representation of data. Tables provide a visual representation of data points, allowing for a quick overview and easy comparison of values.

Flexibility:

Equations offer flexibility in terms of adjusting variables and parameters to explore different scenarios and make predictions. Tables can be easily modified or expanded by adding or removing data points to reflect new observations or additional information.

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Answer:

see below

Step-by-step explanation:

I am not able to draw graphs or diagrams. However, I can provide a description of how to graph Aaron's data on a set of axes.

Note.The horizontal axis could be marked with a scale of every hour, while the vertical axis could be marked in increments of 2°F to fit all the data.

Answer: $88.90

Step-by-step explanation:

$39.95 x 2 + 0.06 x 150

Answer:

Option A. The student incorrectly used < instead of > for the second inequality. The correct inequality is >.

Step-by-step explanation:

Boundary lines that are often used in systems of linear inequalities determine the location of the solutions region in a coordinate plane.

Given the systems of linear inequalities: y ≤ 0.5x + 1 and y = -2x + 1:

In order to determine what is the appropriate inequality symbols for both equations, we must first set the second equation with an equal sign. Then, choose a test point (not in either lines) to determine which half-plane region must be shaded.

Test point: (0, 0)

Substitute the test point into both equations to determine whether it satisfies the given equation:

0 ≤ 0.5(0) + 1

0 ≤ 0 + 1

0 ≤  1  (True statement).

0 = -2(0) + 2

0 = 0 + 2

0 = 2 (False statement). Therefore, the half-plane region that doesn't contain the test point must be shaded.  Hence, we must use the ">" symbol for this equation, as we're shading "above" where the values for y is greater than the y-intercept, (0, 2).

Therefore, the correct answer is Option A:  The student incorrectly used < instead of  > for the second inequality. The correct inequality is  > (greater than symbol).

By elimination, the solution of the system of equations, 5x - 2y = -19 and 2x + 3y = 0, is (-3 , 2).

A system of equations is a set of two or more equations which includes common variables. To solve system of equations, we must find the value of the unknown variables used in the equations that must satisfy all the equations.

There are three methods that can be used to solve system of equations.

1. Elimination

2. Substitution

3. Graphing

Using the elimination method, given two equations in x and y, a variable should be eliminated by adding/subtracting the two equations.

First, multiply the first equation by 3 and the second equation by 2.

5x - 2y = -19 ⇒ 15x - 6y = -57     (equation 1)

2x + 3y = 0 ⇒ 4x + 6y = 0     (equation 2)

Adding the two equations will eliminate the variable y.

15x - 6y = -57     (equation 1)

4x + 6y = 0     (equation 2)

19x        = -57

x = -3

Substitute the value of x to any of the two equation and solve for y.

2x + 3y = 0     (equation 2)

2(-3) + 3y = 0

3y = 6

y = 2

Hence, the solution of the system of equations is (-3 , 2).

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Therefore, the total distance Gabe will paddle is 2x + 400 meters. The exact value of x depends on the width of the river, which is not provided in the given information.

To find the total distance Gabe will paddle, we need to consider the distance he will travel from Q to P, then from P to R, and finally from R back to Q.

First, let's consider the distance from Q to P. Since Gabe will paddle in a diagonal line across the river, this distance can be calculated using the Pythagorean theorem.

The length of the bridge (PR) is given as 400 meters, which is the hypotenuse of a right triangle. The width of the river can be considered as the perpendicular side, and the distance Gabe will paddle from Q to P is the other side. Let's call this distance x.

Using the Pythagorean theorem, we have:

x^2 + (width of the river)^2 = PR^2

Since the width of the river is not given, we'll represent it as w. Therefore:

x^2 + w^2 = 400^2

Next, let's consider the distance from P to R. Gabe will paddle along a route beside the bridge, which means he will travel the length of the bridge (PR) again. So, the distance from P to R is also 400 meters.

Finally, Gabe will paddle back from R to Q along the shore. Since he will follow the shoreline, the distance he will paddle is equal to the distance from Q to P, which is x.

To find the total distance, we add up the distances:

Total distance = QP + PR + RQ

= x + 400 + x

= 2x + 400

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The five-number summary is:

Minimum: 9

First Quartile: 16.5

Median: 25.5

Third Quartile: 39

Maximum: 51

3. Range = 42

4. Interquartile range = 22.5

Given the data for the lengths as, 36, 15, 9, 22, 36, 14, 42, 45, 51, 29, 18, 20, to find the five-number summary of the data set, we would follow the steps below:

1. The numbers in ordered from the smallest to the largest would be:

9, 14, 15, 18, 20, 22, 29, 36, 36, 42, 45, 51

2. The five-number summary for the lengths in minutes would be:

3. Range of the data = max - min = 51 - 9 = 42

4. The interquartile range for the data set = Q3 - Q1 = 39 - 16.5

Interquartile range for the data set = 22.5

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Answer:

V2 has more room than the Aquarium.

Step-by-step explanation:

The expression ((t − 9) · (t² − 9) · (t³ − 9) · (t⁴ − 9) · (t⁵ − 9) · (t⁶ − 9) · (t⁷ − 9) can be written in terms of product notation as Π⁷k=1 \((t^k - 9)\).

As per the question, we can write the expression as:

(t − 9) · (t² − 9) · (t³ − 9) · (t⁴ − 9) · (t⁵ − 9) · (t⁶ − 9) · (t⁷ − 9)

Using product notation, we can write this as:

Π⁷k =1 \((t^k - 9)\)

where Π represents the product of terms, k is the index of the product, and the subscript 7 indicates that the product runs from k = 1 to k = 7.

Therefore, the expression ((t − 9) · (t² − 9) · (t³ − 9) · (t⁴ − 9) · (t⁵ − 9) · (t⁶ − 9) · (t⁷ − 9) can be written in terms of product notation as Π⁷k=1 \((t^k - 9)\).

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F distribution is used with the global test of the regression model to reject the null hypothesis.

The hypothesis test will be conducted using a novel distribution. After the English statistician Sir Ronald Fisher, it is known as the F distribution. A ratio, the F statistic is (a fraction). One set of degrees of freedom is for the denominator, and the other set is for the numerator.

According to the null hypothesis, all group population means are equal. Because it is assumed that the populations are normal and that they have similar variances, the equal means hypothesis indicates that the populations have the same normal distribution. All groups are samples from populations with the same normal distribution, according to the null hypothesis. According to the alternative theory, at least two of the sample groups are drawn from populations with various normal distributions.

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For parametric test, the appropriate measure of central tendency is Mean.

Parametric tests are hypothesis tests that make assumptions about the distribution of the population. For example, normality and homoscedasticity are two common assumptions made by parametric tests. In contrast, nonparametric tests make no such assumptions about the underlying distribution of the population.

The mean is a popular and simple measure of central tendency. It is widely used in statistical analysis. It is a useful measure of central tendency in the following situations:

When data are interval or ratio in nature

When data are normally distributed

When there are no outliers

When the sample size is large and random

The following are the advantages of using mean:

It is easy to understand and calculate

It is not affected by extreme values or outliers

It can be used in parametric tests

It provides a precise estimate of the average value of the data

It is a stable measure of central tendency when the sample size is large

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The median height of the boys aged 13 years is 160 cm.

option D.

From the given equation of line of best fit, the median height of the boys aged 13 years is calculated as follows;

The given equation for line of best fit is;

y = 6.5x + 75.5

where;

when x = 13 years, the value of y, median height, is calculated as follows;

y = 6.5 (13) + 75.5

y = 160 cm

Thus, the median height of the boys aged 13 years is determined by applying the given equation for line of best fit,

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The ratio of chlorine to sodium in a salt is 42.59 to 21.00. Using this ratio, it was determined that there is approximately 19.67 kg of sodium in 40.00 kg of salt.

To find the amount of sodium contained in 40.00 kg of salt, we need to determine the proportion of sodium in the salt based on the given ratio.

The ratio of chlorine to sodium is given as 42.59 to 21.00. This means that for every 42.59 parts of chlorine, there are 21.00 parts of sodium.

To find the amount of sodium in the 40.00 kg of salt, we can set up a proportion using the ratio:

21.00 parts of sodium / 42.59 parts of chlorine = x kg of sodium / 40.00 kg of salt

Now, let's solve for x:

x = (21.00 / 42.59) * 40.00

x ≈ 19.67 kg (rounded to two decimal places)

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Answer:

here you go :)

Step-by-step explanation:

Terminating decimals: these have a finite number of digits after the decimal point.

 Recurring decimals: these have one or more repeating numbers or sequences of numbers after the decimal point, which continue infinitely.

The set of real numbers includes both rational and irrational numbers.


1. Real numbers: Real numbers include all rational and irrational numbers. They can be represented on a number line and are not limited to whole numbers or integers.

2. Rational numbers: Rational numbers are numbers that can be expressed as a fraction or a ratio of two integers. They can be written in the form a/b, where a and b are integers and b is not equal to 0. For example, 3/4, -2/5, and 0.6 are all rational numbers.

3. Irrational numbers: Irrational numbers are numbers that cannot be expressed as a fraction or a ratio of two integers. They cannot be written in the form a/b. Examples of irrational numbers include √2, π (pi), and e.

Therefore, the set of real numbers includes both rational and irrational numbers.

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Plotting the relationship between the number of hours studied and exam results reveals a negative correlation curve, where the exam results get worse as the number of hours studied rises.

The point (10,70) would be plotted on the negative correlation curve, for instance, if a student spent 10 hours studying and received a 70 on their exam. A downward sloping negative correlation curve would result as study time increased and exam score decreased. A graph illustrating the relationship between two variables, where an increase in one variable is accompanied by a drop in the other, is called a negative correlation curve. Numerous various types of situations, such as the amount of hours studied and exam results, might demonstrate this type of link. Exam scores typically decline as the amount of study time increases.

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Answer: 3rd one I think

Step-by-step explanation: I had smth like this

Answer:

You got it right! The answer is [A].

Step-by-step explanation:

Visualize a rectangle 4 units long and 2 units wide. Doesn't each part of the triangle seem to be a half of different parts of the rectangle?