Answer this question to chick you knowledge

Answer:

angle 1 is 90

angles 2 and 3 are 65

angle 4 is 25

The cofactor of A is C = [-3 0; 0 -46], and the determinant of A is -3.

The cofactor of each element in a 2x2 matrix is found by switching the signs of the elements in the determinant when the sum is taken (i.e. changing the sign of one element in the determinant if it is in an odd-numbered row or column).

For a 2x2 matrix A = [a b; c d], the determinant is given by det(A) = ad - bc.

For the given matrix A = [1 1 47; 1 2 2; 2 5 1], the cofactor matrix C is found by finding the determinant of each 2x2 sub-matrix obtained by excluding one row and one column of A.

C = [(-1)(2-5) (1)(2-2); (1)(1-1) (-1)(1-47)].

C = [-3 0; 0 -46].

To find the determinant of A using the cofactor matrix C, we take the sum of the products of the elements in each row of A and the corresponding elements in each column of C.

det(A) = 1*-3 + 10 + 470 + 10 + 20 + 2*-46 = -3.

So the determinant of A is -3.

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Answer:

1. 300

2. 46

3.  7340

4. 650

5. 0.56

6. ? (Did you mean 500 -10 or 500 + 10?)

7. 650

8. 3560

9. ? (What?)

10. ? (Did you mean 15,687 - 1000 or 15,687 + 1000)

Answer:

4/36 (11.111%)

Step-by-step explanation:

Answer:

decimal form is limited of 3 numbers after the point only.

so it will be 1.45

I hope I help you in this ans and tq.

Answer:

x = 23

Step-by-step explanation:

180 - 42 = 138

138/6 = 23

x = 23

Answer:

36

Step-by-step explanation:

Let Brandon's age be b. We can write 4b = b + 27 which gives us b = 9. Because Michael is 4 times as old as Brandon, he is 9 * 4 = 36 years old.

Answer:

36

Step-by-step explanation:

Micheal is 4 times as old as Brandon.

y = 4x

Micheal is also 27 years older than Brandon.

y = x +27

Y represents Micheal's age, and x represents Brandon's age.

Since both equations above are equal to the same value, y, you can set the two equations equal to each other.  Solve for x.

4x = x + 27

3x = 27

x = 9

Brandon is 9 years old.  

Plug Brandon's age into one of the equation to solve for Micheal's age.

y = x + 27

y = 9 + 27

y = 36

Micheal is 36 years old.

Answer:5

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

19-14 = 5

24 - 19 = 5

29 - 24 = 5

and so on

I hope this helps!

Answer:

x=c-g or x=-g+c

Step-by-step explanation:

The second derivative of the wave function ψn(x) in the interval 0≤x≤l is expressed as d²ψn(x)/dx² = -(n²π²c/l²) sin(nπx/l). This result tells us about the curvature of the wave and can help us understand the energy levels of the particle.

To determine the second derivative of the wave function ψn(x) in the interval 0≤x≤l, we first need to understand the function and its derivative. The wave function represents the probability density of finding a particle in a particular state, while the derivative of the wave function gives the momentum of the particle.
Therefore, the second derivative of the wave function gives the curvature of the wave and can tell us about the energy levels of the particle.
Expressing the answer in terms of n, x, l, and c, we can use the Schrödinger equation and the general solution of the wave function to find the second derivative. We know that the wave function ψn(x) is given by ψn(x) = c sin(nπx/l), where c is a constant and n is the energy level.
Taking the derivative of this wave function, we get dψn(x)/dx = (nπc/l) cos(nπx/l). And taking the derivative of this function again, we get the second derivative as d²ψn(x)/dx² = -(n²π²c/l²) sin(nπx/l).
Therefore, the second derivative of the wave function ψn(x) in the interval 0≤x≤l is expressed as d²ψn(x)/dx² = -(n²π²c/l²) sin(nπx/l). This result tells us about the curvature of the wave and can help us understand the energy levels of the particle.

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The exact growth rate (r) for the exponential model or the slope (m) and y-intercept (b) for the linear model. More data points or additional information about the population growth pattern would be needed to construct a precise model for P(t).

To find a model for P(t), representing the U.S. population in 1960, we need to determine the growth or decay rate over time. Without additional information or assumptions about the population growth, we cannot provide an exact model. However, we can explore two common models: exponential growth and linear growth.

1. Exponential Growth Model:

If we assume that the U.S. population experienced exponential growth, we can use the formula P(t) = P₀ * e^(rt), where P₀ represents the initial population, r is the growth rate, t is the time in years, and e is the base of the natural logarithm (approximately 2.71828).

Using the given information that the U.S. population in 1960 was 181 million, we can write the equation as follows:

181,000,000 = P₀ * e^(r * 1960)

2. Linear Growth Model:

Alternatively, if we assume that the U.S. population grew linearly, we can use the formula P(t) = mt + b, where m is the slope (rate of change) and b is the y-intercept.

Using the given information, we can form an equation as follows:

181,000,000 = m * 1960 + b

Without further information or data points, we cannot determine the exact growth rate (r) for the exponential model or the slope (m) and y-intercept (b) for the linear model. More data points or additional information about the population growth pattern would be needed to construct a precise model for P(t).

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The given integral can be rewritten as \(e^-7* (-7) dx\) and used the general exponential rule to evaluate it as (-1/7) e^-7x + C.

Now, we rewrite the given integral as follows:

−7e−7x dx = e−7x (−7) dx

Next, we can use the general exponential rule, which states that ∫ \(e^u du = e^u + C,\) where C is the constant of integration.

So, substituting u = -7x, we get:

e−7x (−7) dx = (-1/7) ∫ \(-7e^-7x d(-7x)\)

Using integration by substitution, where v = -7x and dv/dx = -7, we get:

(-1/7) ∫ \(-7e^-7x  d(-7x)\) = (-1/7) ∫ \(e^v dv\)

Simplifying this, we get:

(-1/7) ∫ \(e^v dv = (-1/7) e^v + C\)

Substituting back for v = -7x, we get:

\((-1/7) e^{(-7x)} + C\)

Therefore, we have rewritten the given integral as \(e^-7x (-7) dx\)  and used the general exponential rule to evaluate it as \((-1/7) e^{-7x} + C.\)

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Answer:

First Row: Given

Second Row: Definition of Regular Polygon

Third Row: Definition of Congruence In Terms of Rigid Motion

Fourth Row: Definition of Regular Polygon

Fifth Row: SAS Triangle Congruence Theorem

Sixth Row: CPCTC

Step-by-step explanation:

This is a basic proof in order to prove that verticals of a polygon are congruent. This should be the right answer since it's the only thing that makes sense to me. I really hope this helps you and thanks for being patient! I've been doing geometry and we have to prove everything we claim in a proof just like this one. However, there was one I kind of guessed on (the third row), but I think it should be correct! I saw from the photo that you have a check answer on the bottom of your screen. Just check the answers that I have for you now and if something is wrong, then we can continue talking about it! Hope this helps!! :)

Answer:

180 - 110 = 70

<DBC = 70

Answer:

  y = -3cos(πx/4) +3

Step-by-step explanation:

You want a possible trig function that describes the values in the given table.

Looking at the table, we find the minimum y-value is 0, and it corresponds to x=0 and x=8. This means the period (P) of the function is 8.

The maximum y-value is 6. This means the midline (M) of the function is 3, the average of the minimum and maximum: (0 +6)/2 = 3.

The amplitude (A) of the function is the difference between the maximum value and the midline value: 6 -3 = 3.

The sine and cosine functions both oscillate back and forth between a value of -1 and a value of +1. The cosine function has its maximum at x=0, but the function needed here will have a minimum at x=0. We can use the cosine function, but it needs to be reflected over the x-axis (or midline).

In general the trig function we're looking for will have the form ...

  y = Acos(2πx/P) +M

As discussed above, the value of A will need to be negative to reflect the function over its midline. For A=-3, M=3, P=8, the function is ...

  y = -3cos(2πx/8) +3

  y = -3cos(πx/4) +3

__

Additional comment

In the case where the extreme values (cosine) or the midline values (sine) are not at x=0, there is a "phase shift" involved. That is, the trig function will need to be translated horizontally to match values in the table. That translation is accomplished by adding or subtracting a value from x. Translation of the cosine function is not needed in this case.

The correlation coefficient that best represents a moderate relationship showing fewer anxiety symptoms is a negative correlation coefficient.

In a negative correlation, as one variable increases, the other variable decreases. In the context of anxiety symptoms, a negative correlation would indicate that as one factor (e.g., a particular intervention, treatment, or activity) increases, the number or severity of anxiety symptoms decreases. This suggests a moderate relationship between the two variables, indicating that the higher the value of the independent variable, the lower the value of the dependent variable (in this case, fewer anxiety symptoms).

The correlation coefficient ranges from -1 to 1, with -1 representing a perfect negative correlation, 0 representing no correlation, and 1 representing a perfect positive correlation. A correlation coefficient close to -1, but not reaching -1, would be indicative of a moderate negative correlation and would best represent a moderate relationship showing fewer anxiety symptoms.

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Answer: the anserw shokd be no fles

Step-by-step explanation:

The correct option is C. The ordered pairs: {(–2, 4), (0, 0), (2, 4)}

An ordered pair in mathematics is a set of two things. The order of the objects in the pair matters because, unless a = b, the ordered pair differs from the ordered pair. Ordered pairs are also known as 2-tuples or 2-length sequences.

It's important to remember that, the first the showed in the image represents a domain, and the second set represents a range. That means the values -2, 0, 2, must appear as the first value in the coordinate, and the values 4 and 0, must appear second.

Now, if we associate the given diagram with coordinates, it would be like

Therefore, the right answer is choice c.

Additionally, this relation models a quadratic function actually, because -2 and 2 have the same image 4.

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Step-by-step explanation:

They can be found by considering where the second derivative changes signs. In similar to critical points in the first derivative, inflection points will occur when the second derivative is either zero or undefined.

make me brainlist

Iliana is painting a picture. She has green, red, yellow, purple, orange, and blue paint. She wants her painting to have four different colors.



If order does not matter, in how many ways can she pick four colors if green must be one of them?

we have a combination problem

C(3,5) ------> because green must be one of them

Applying the formula

The one-way ANOVA (fixed effect) with a = 0.05, demonstrates that there is a significant difference between the means of the three sections.

ANOVA is a statistical technique that compares the variance between the groups to the variance within the groups to determine if there are significant differences. In this case, the F-ratio is 7.202, and the p-value is 0.0039. Since the p-value is less than 0.05, there is sufficient evidence to reject the null hypothesis. This suggests that the exam scores are not the same for all sections, meaning that there is a significant difference between the three sections. Furthermore, the highest exam score was in Section 1, which shows that this section performed the best. Section 2 had the lowest score, which indicates that this group performed the worst.

The mean exam scores for each group were: Section 1: 81.22Section 2: 64.97Section 3: 70.64

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A person tosses a coin 15 times. In how many ways can he get 3 heads? The answer is 455 ways.

To find the answer, we can use the formula for combinations, which is:
C(n, k) = n! / (k! * (n-k)!)
Where n is the total number of tosses, and k is the number of heads we want to get.
In this case, n = 15 and k = 3, so we can plug these values into the formula:
C(15, 3) = 15! / (3! * (15-3)!)
C(15, 3) = 15! / (3! * 12!)
C(15, 3) = (15 * 14 * 13 * 12!)/ (3! * 12!)
C(15, 3) = 455
So there are 455 ways to get 3 heads when tossing a coin 15 times.

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Answer:

1a) h = 2

1b) "h" represents the amount of hours the electrician worked, so the electrician worked two hours. "60" represents the cost per hour. "20" represents the beginning service fee. "140" represents the total cost in the end.

2a) This impacts the meaning because instead of the equation, meaning that the customer of the electrician payed exactly $140, it is turned into an inequality, which means the customer payed $140 at most.

2b) The electrician charges a $20 service fee, plus $60 per hour for electrical repairs. The customer payed $140 at most. This is shown with the following equation: 60h + 20 < 140

Step-by-step explanation:

60h+20=140

60h=120

h=2

Answer:

Step-by-step explanation:B

Answer:

that would be B.

Step-by-step explanation:

its at the end and it is only 25% of it there is no way it could be 75% or 50% so the best choice would be 25% B

Answer:

Option (C) : y = 6 / 11

Step-by-step explanation:

To find Horizontal Asymptote of the function, you need to see degree of of numerator and denominator.

Since, the degrees of the numerator and denominator are the same,

Horizontal Asymptote = leading coefficient of the numerator divided byleading coefficient of the denominator

Therefore,

Horizontal Asymptote = 6 / 11