T/F : Find a 3 by 3 matrix A which is not invertible, but where no two columns are scalar multiples of each other, and no two rows are scalar multiples of each other

The given representation of the sample is an unbiased sample.

When some population members have a higher or lower sampling probability than others, the sample is biased.

This includes choosing or sampling people according to their hobbies, gender, or age.

Therefore, an unbiased sample must be representative of the entire population under investigation.

Given, There is a plan being discussed to build a skate park in a neighborhood.

The city sends out a newsletter and asks for people to respond with their opinion.

As they have sent newsletters and asked random people for feedback this would be an unbiased sample.

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The p-value for the test is 0.01.

Test the assertion that the web-based self-paced technique's mean test score is lower than that of the conventional method.

u1 = u2

u1 > u2

Test statistics is

\(t=\frac{\bar{x}-\bar{y}}{\sqrt{\frac{\sigma 1^2}{n1}+\frac{\sigma 2^2}{n2}}}\)

\(t=\frac{84-81}{\sqrt{\frac{28}{80}+\frac{40}{40}}}=2.58\)

t=2.58

Compute the value of the test statistic as given

t = (84 - 81) / ((28/80) + (40/40)) = 2.58

Determine the degree of freedom.

df = ((28/80) + (40/40))² / ((28/80)² / (80-1) + (40/40)² / (40-1)) = 77.54

Next find the p-value using a t-test to calculate the p-value. This can be done using a statistical software package or online calculator.

p-value = 0.01

The p-value for this problem is 0.01, which means that there is a 1% chance that the results could have occurred by chance.

Hence , The p-value is less than 0.05, so we skip the null hypothesis.

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The equation for the total number of coins is given as follows:

x + y = 12.

The equation for the total value of the coins is given as follows:

0.1x + 0.05y = 2.4.

The variables for the system of equations are defined as follows:

They have a total of 12 coins, hence the equation for the total number of coins is given as follows:

x + y = 12.

Considering the value of each coin, 10 cents = 0.1 and 5 cents = 0.05, the  equation for the total value of the coins is given as follows:

0.1x + 0.05y = 2.4.

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The equation for the total number of coins is given as follows:

x + y = 12.

The equation for the total value of the coins is given as follows:

0.1x + 0.05y = 2.4.

The variables for the system of equations are defined as follows:

They have a total of 12 coins, hence the equation for the total number of coins is given as follows:

x + y = 12.

Considering the value of each coin, 10 cents = 0.1 and 5 cents = 0.05, the  equation for the total value of the coins is given as follows:

0.1x + 0.05y = 2.4.

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Answer:   The slope for this line is m=−12.

T.Step-by-step explanation:

To find the slope of a line passing through two points you use the formula: m=y2−y1x2−x1.

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Answer:

55 cm

Step-by-step explanation:

height = 4895/89 = 55 cm

Answer:

1 A

2 B

3 D

4 B

5 A

6 D

7 C

8 B

9 C

Step-by-step explanation:

1 A

2 B

3 D

4 B

5 A

6 D

7 C

8 B

9 C

The expanded expression is: (-3)⁴*c⁴

And the simplified expression is written as: 81*c⁴

Here we have the expression:

(-3c)⁴

To expand this we need to remember that the exponents are distributive under products, then we can expand the expression to get the expansion:

(-3)⁴*c⁴

Now to simplificate it, we can simplify the first factor, the fourth power of the number -3 is:

(-3)⁴ = 81

Now replace that in the expression written above, then we will get the simplified expression:

81*c⁴

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Answer:

Hopefully this can help

Step-by-step explanation:

Answer:

\(3x^{2} (x+5)(x-5)\)

Step-by-step explanation:

Answer:

x ≈ 3.5 cm

Step-by-step explanation:

Using the sine ratio in the right triangle

sin23° = \(\frac{opposite}{hypotenuse}\) = \(\frac{x}{y}\) = \(\frac{x}{9}\) ( multiply both sides by 9 )

9 × sin23° = x , then

x ≈ 3.5 cm ( to 1 dec. place )

Answer:

10

Step-by-step explanation:

50 divded by 5=10

5 divided by 5=1

10/1=10

okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

Therefore ,xa - xb = 3 and σa - σb = √(6/60) + (8/60) respectively are the units that were chosen and standard deviation difference.

How far the data points deviate from the mean is determined by descriptive statistics standard deviation. It quantifies how values are spread out over the sample data and gauges how far out of the mean data points are.

Here,

Given:

For Amanda's chicken, xa = 57 grammes is the average weight.

Chicken from Bernardo weighs, on average, 54 grammes.

The sample mean's difference is -

=> xa - xb

=> 57 - 54

=> 3

The chicken from Amanda's recipe had a standard deviation of 6 grammes.

The Bernardo's chicken standard deviation is b = 8 grammes.

N = 60 total observations were made.

The standard deviation formula is -

σ = √(x - μ)/n

σa - σb = √(6/60) + (8/60)

The figures are as follows: mean = 3; standard deviation = ((6/60) + (8/60).

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To the nearest percent, the probability that an earthquake will occur while you are at work is approximately 23%.

The probability that an earthquake will occur while you are at work can be calculated by dividing the number of hours you are at work by the total number of hours in a year.
Step 1: Calculate the total number of hours in a year:
There are 24 hours in a day, so multiplying 24 by 365 (the number of days in a year) gives us 8,760 hours in a year.
Step 2: Calculate the number of hours you are at work in a year:
Since you work 8 hours per day, multiply 8 by 250 (the number of days you work in a year) to get 2,000 hours.
Step 3: Calculate the probability:
Divide the number of hours you are at work (2,000) by the total number of hours in a year (8,760) and multiply by 100 to convert to a percentage.
Probability = (2,000 / 8,760) * 100 = 22.83%
Therefore, to the nearest percent, the probability that an earthquake will occur while you are at work is approximately 23%.

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The total number of people who attended the symposium from a large crowd is equal to 518.

Let us consider the number of people who attended the symposium x.

6 times the number of people who attended the symposium is 3034 more than 1/7 of the attendance.

This can be written as,

6x = (1/7)x + 3034

To solve for x,

First simplify the equation by multiplying both sides by 7 to get rid of the fraction,

42x = x + 21238

Next, isolate x on one side of the equation by subtracting x from both sides,

⇒ 41x = 21238

Finally, solve for x by dividing both sides by 41,

⇒ x = 518

Therefore, number of people who attended the symposium is equal to 518.

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Answer:

1/13 or 7.69%

Step-by-step explanation:

A standard 52 card deck has 4 queens. So the probability of being dealt a queen is:

P(Queen) = 4/52

= 1/13

The probability is 1/13. To find the percent, divide 1÷13 and then times by 100.

1÷13 = 0.0769

0.0769× 100 = 7.69

This is 7.69%

Answer:It has been shown that the function is not continuous at (0,0).

The question is about finding the function's continuity at (0,0). Given a function f such that:

{1 (x,y) = (0,0)f(x, y)

= {x^2+y/x+y (x,y)

≠ (0,0)

It is required to show that the function is not continuous at (0,0).Solution:The function is given by:

{1 (x,y) = (0,0)f(x, y)

= {x^2+y/x+y (x,y)

≠ (0,0)

To prove the function is not continuous, we will have to show that limf(x,y) when (x,y) → (0,0) does not exist. Let us try to find limf(x,y) when (x,y) → (0,0).

Let y=0.

Hence,f(x,y) = f(x,0)

= {x^2/x}

= x

when x ≠ 0. Now when y = 0,x → 0, f(x,0) → 0.

This indicates that the limit of the function exists when x approaches 0.Now let x=0.

Hence,f(x,y) = f(0,y)

= {y/y} = 1 when y ≠ 0. Now when

x = 0,y → 0, f(0,y) → 1.

This indicates that the limit of the function exists when y approaches 0.

Now, we put x=y

= t.

Hence,f(t,t) = {2t/t+t}

= 1

when t ≠ 0. Now when t → 0,f(t,t) → 1.

This indicates that the limit of the function exists when x and y approach 0 simultaneously.Now, we have found the limit of the function along x and y axis and also when x=y. If limf(x,y) when (x,y) → (0,0) exists, it should be equal to all the limits that we have found so far.

Hence the limit should be equal to 0 and 1, which is a contradiction. This means that the limit does not exist when (x,y) → (0,0).

Therefore, the function is not continuous at (0,0).

Hence, it can be concluded that the given function is discontinuous at (0,0).

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(a) The mean number of buses arriving in any interval of minutes is λ = 1.

(b) The probability of buses arriving in a t-minute interval is P(X > 0) = 1 - P(X = 0), where X is a Poisson random variable with parameter λt.

(c) The probability of no buses arriving in a t-minute interval is P(X = 0) = \(e^{(-λt)}\) = \(e^{(-t)}\).

(d) The probability of at least one bus arriving in a t-minute interval is

P(X ≥ 1) = 1 - P(X = 0) = 1 - \(e^{(-t)}\).

To guarantee at least one bus with a certain percentage of probability, we need to solve the inequality:

where p is the desired probability. Solving for t, we get:

Therefore, the minimum wait time necessary to guarantee at least one bus with a probability of p is -ln(1-p) minutes.

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Answer:

graph B because you can tell that one has a line not even so it's correct

Answer:

Graph A

Step-by-step explanation:

The graph of a proportional relationship is a line through the origin or a ray whose endpoint is the origin.

Graph A is the only graph that goes through the origin (the point where the x and y axis intersect).

The income of whales star after 3 years and getting 19% rise every year will be  $1685159 .

Given, The whales' star cornerback is paid $1 million and is guaranteed a 19% pay raise for the next three years .

To get the salary of whale star after 3 years of increment with 19%.

Salary =  $1 million

Salary after 1st increment =  $1 million +  $1 million of 19%

Salary after 1st increment = $1190000

Salary after 2nd increment =  $1190000 + $1190000 of 19%

Salary after 2nd increment = $1416100

Salary after 3rd increment =  $1416100 + $1416100 of 19%

Salary after 3rd increment = $1685159

Final salary after 3 years will be  $1685159.

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Answer:

75

Step-by-step explanation:

well if you look at it it comes at a slope

Answer:

Step-by-step explanation:

x=1 and y=1

Step-by-step explanation:

y=6x-8

3x=10-y

y=2(10-y)-8

3x=10-y

2y=12

3x=10-y

y=6

3x=4

y=6

x=4/3

The area of the circle in the graph is 113 square units.

Remember that for a circle of radius R, the area is given by the simple formula you can see below.

A = pi*R²

Where pi = 3.14, so we can use this formula to find the area of the circle.

On the diagram we can see that the radius of the circle is:

R = 6 units

Replacing that in the area formula we will get.

A = 3.14*(6 units)²

A = 113.04 units ²

The correct option is the third one.

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The slope of the table is 5 / 4 .

The slope of a line is the change in the dependent variables with respect to the change in the independent variable.

The slope of a line is rise over run.

In other words, the slope of a line is a measure of its steepness.

Therefore, let's find the slope of the table.

slope = change in y / change in x

Therefore,

slope = y₂ - y₁ / x₂ - x₁

Using (4, 5) and (8, 10)

slope = 10 - 5 / 8 - 4

slope = 5 / 4

Therefore, the slope is 5 / 4.

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Answer:

1.25

Step-by-step explanation:

You divide five by four, and you get one and twenty-five hundredths.

Answer:

2.5

Step-by-step explanation:

12 -> 6
so the triangle on the left is dilated 2x the triangle on the right

5 -> 2.5

El área de papel utilizada para cada CD es aproximadamente 20.41 cm².

How much paper area is used for each CD?

Para calcular el área de papel utilizado para cada CD, necesitamos determinar el área de la región entre dos círculos concéntricos.

El área de un círculo se calcula utilizando la fórmula A = πr², donde r es el radio. En este caso, tenemos dos círculos con radios diferentes: el radio mayor de 5.8 cm y el radio menor de 0.7 cm.

El área del papel utilizado será la diferencia de áreas entre los dos círculos. Entonces, podemos calcularlo de la siguiente manera:

Área utilizada = Área del círculo mayor - Área del círculo menor

= π(5.8²) - π(0.7²)

= π(33.64) - π(0.49)

≈ 105.72 - 1.54

≈ 104.18 cm²

Por lo tanto, aproximadamente se utilizan 104.18 cm² de papel para cada CD.

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