A customer who bought goods on credit 6 months ago has gone out of business. The company doesn't expect to receive payment and has already adjusted for the doubtful collection on this customer account. What's the correct entry to remove the outstanding balance?a)Debit allowance for doubtful accounts, credit bad debt expenseb)Debit accounts receivable, credit allowance for doubtful accountsc)Debit allowance for doubtful accounts, credit accounts receivabled)Debit accounts receivable, credit bad debt expensee}Debit sales, credit accounts receivable

The equation of the line that passes through (2, -1) and is parallel to the graph of y = 5x - 2 is y = 5x - 11

To find the equation of a line that is parallel to the given equation y = 5x - 2 and passes through the point (2, -1), we can use the fact that parallel lines have the same slope.

The given equation is in slope-intercept form y = mx + b, where m represents the slope. In this case, the slope of the given equation is 5.

Since the line we want to find is parallel, it will also have a slope of 5. Therefore, the equation of the line passing through (2, -1) and parallel to y = 5x - 2 can be written as:

y = 5x + b

To find the value of b, we substitute the coordinates of the given point (2, -1) into the equation:

-1 = 5(2) + b

Simplifying:

-1 = 10 + b

To isolate b, we subtract 10 from both sides:

b = -1 - 10

b = -11

Therefore, the equation of the line that passes through (2, -1) and is parallel to the graph of y = 5x - 2 is:

y = 5x - 11

learn more about parallel line at https://brainly.com/question/30231436

#SPJ11

The relative frequency for getting a marble that is either red or blue is equal to 16/25

When we perform an experiment N times, and we get a given outcome K times, the relative frequency of said outcome is:

F = K/N

Here we can see that the experiment was performed 25 times, and the outcomes blue or red appeared 8 times each (so 16 in total)

Then the relative frequency for getting a marble that is either red or blue is:

F = 16/25 = 0.64

Learn more about relative frequency at:

https://brainly.com/question/3857836

#SPJ1

An area on the graph that represents the amount of goods the company could actually produce include the following: C. The area inside the curved line.

In Economics and Mathematics, a production possibilities curve (PPC) is sometimes referred to as the production possibilities diagram or the production possibilities frontier (PPF) and it can be defined as a type of graph that is typically used for illustrating the maximum and best combinations of two (2) products that can be produced by a producer (manufacturer) in an economy, if they both depend on the following two (2) factors;

Based on the production possibilities curve shown in the image attached above, we can reasonably infer and logically deduce that represents the amount of goods which this company could actually produce is the area inside or within the curved line.

Read more on production possibilities here: brainly.com/question/26460726

#SPJ1

To diagonalize matrix A, we find eigenvalues (-1, -2, 3) and corresponding eigenvectors. Constructing P and its inverse, we obtain D, where D = P^(-1)AP.



To diagonalize the given matrix A, we need to find the eigenvalues and eigenvectors of A. By solving the characteristic equation, we find that the eigenvalues of A are -1, -2, and 3.Next, we find the corresponding eigenvectors by solving the equations (A - λI)x = 0, where λ is an eigenvalue and I is the identity matrix. The eigenvectors associated with the eigenvalues -1, -2, and 3 are [2, -1, 0], [1, 0, -1], and [3, 0, 2], respectively.

Forming the matrix P using the eigenvectors as columns, we have P = [[2, 1, 3], [-1, 0, 0], [0, -1, 2]]. Taking the inverse of P, we get P^(-1) = [[2/7, -1/7, -9/7], [-3/7, -2/7, 3/7], [3/7, 3/7, -2/7]].Finally, the diagonal matrix D is formed using the eigenvalues of A as its diagonal entries, repeated with their multiplicities. Thus, D = [[-1, 0, 0], [0, -2, 0], [0, 0, 3]].

Therefore, we have D = P^(-1)AP, where P is the invertible matrix and D is the diagonal matrix.

To learn more about diagonal matrix click here

brainly.com/question/31724920

#SPJ11

There are 20 different combinations are possible.

Since, A combination is a technique to determines the number of possible arrangements in a collection of items where the order of the selection does not matter.

We have to given that;

Her choices of toys are a deck of playing cards, crayons and paper, a model airplane, or a hand-held video game.

And, Her choices of stuffed animals are a bear, rabbit, frog, gorilla, or squirrel.

Hence, There are 4 toys and 5 animals.

So, The combinations for choose one toy and one stuffed animal to take on a trip is,

⇒ ⁴C₁ × ⁵C₁

⇒ 4! / 1! 3! × 5! / 1! 4!

⇒ 4 × 5

⇒ 20

Thus, There are 20 different combinations are possible.

Learn more about the combination visit:

brainly.com/question/28065038

#SPJ1

the critical value corresponding to a sample size of 24 and a confidence level of 95% is 2.064.

the critical value corresponds to the z-score that defines the boundary for the confidence interval. In this case, with a sample size of 24 and a confidence level of 95%, we use a two-tailed z-test. Looking up the z-score for a confidence level of 95%, or alpha of 0.025, we can find the critical value of 2.064.

the critical value for a sample size of 24 and a confidence level of 95% is 2.064. This value is important in calculating the confidence interval for the population parameter.

To know more about value  visit :-

https://brainly.com/question/30145972

#SPJ11

Part A: The bobcat can access approximately 282.74 square feet more area than the rabbit. Part B: No, the bobcat cannot reach the rabbit while they are both tethered to these inside vertices.

Part A: To calculate the difference in the accessible area, we need to find the area of the region accessible to each animal. The bobcat is limited by the length of its chain, forming a circle with a radius of 24 feet, while the rabbit is limited by the length of its rope, forming a circle with a radius of 20 feet. The difference in area can be found by subtracting the area of the rabbit's circle from the area of the bobcat's circle: π(24^2) - π(20^2) ≈ 1809.56 - 1256.64 ≈ 552.92 square feet. Therefore, the bobcat can access approximately 282.74 square feet more area than the rabbit.

Part B: It is not possible for the bobcat to reach the rabbit while they are both tethered to these inside vertices. The distance between the tethering points of the bobcat and rabbit is equal to the distance across the hexagonal cage, which is 30 feet. However, the bobcat's chain is only 24 feet long, so it cannot reach the rabbit at the opposite vertex. Thus, the bobcat is unable to reach the rabbit within the given constraints.

Learn more about a Circle here: brainly.com/question/15424530

#SPJ11

Answer:

4

Step-by-step explanation:

the period is from the top minus top, bottom minus bottom, etc..

one point at the top is one and the next is 5.

5-1=4

hope this helps!

The number of DVDs that will be checked out for every 100 patrons is,

⇒ 70

We have to given that :

A librarian is curious about the habits of the library's patrons. He records the type of item that the first 10 patrons check out from the library.

To Find : Estimate the number of DVDs that will be checked out for every 100 patrons.

Now, Out of 10 persons;

Fiction books = 4

Non-Fiction books = 3

DVD = 2

Audio Book = 1

Total Books = 10

Hence, The number of DVDs that will be  checked out for every 100 patrons is,

= 7 / 10 = x / 100

= 700 / 10 = x

= x = 70

Learn more about the proportion visit:

https://brainly.com/question/1496357

#SPJ1

Using  cylindrical coordinates ∫∫∫ (r^3cos^2θ) dz dr dθ, where r ranges from 0 to 2, θ ranges from 0 to 2π, and z ranges from 0 to √(36r^2).

To evaluate the integral ∫∫∫ x^2 dV over the solid e, using cylindrical coordinates, we need to express the integral in terms of cylindrical coordinates and determine the appropriate bounds for the variables.

In cylindrical coordinates, the solid e can be defined as follows:

Radius: r ranges from 0 to 2 (from x^2 + y^2 = 4, taking the square root).

Angle: θ ranges from 0 to 2π (full revolution around the z-axis).

Height: z ranges from 0 to the height of the cone, which is determined by z^2 = 36x^2 + 36y^2.

To convert the integral, we need to express x^2 in terms of cylindrical coordinates:

x^2 = (rcosθ)^2 = r^2cos^2θ

The integral in cylindrical coordinates becomes:

∫∫∫ (r^2cos^2θ) r dz dr dθ

Now we can determine the bounds for the variables:

r ranges from 0 to 2.

θ ranges from 0 to 2π.

z ranges from 0 to the height of the cone, which can be determined by setting z^2 = 36r^2.

Substituting the bounds and integrating, we can evaluate the integral to find the desired result.

To know more about cylindrical coordinates refer here:

https://brainly.com/question/30394340

#SPJ11

To simplify the expression log 34 - log 32, we can use the properties of logarithms, specifically the quotient rule. The difference of logarithms log 34 - log 32 can be simplified as a single logarithm.

To simplify the expression log 34 - log 32, we can use the quotient rule of logarithms. According to the quotient rule, the difference of logarithms with the same base can be expressed as the logarithm of the quotient of the arguments.

Applying the quotient rule, we have:

log 34 - log 32 = log (34/32)

Simplifying the expression 34/32, we get:

34/32 = 17/16

Therefore, log 34 - log 32 simplifies to:

log (17/16)

So, the difference of logarithms log 34 - log 32 can be expressed as a single logarithm, which is log (17/16). In logarithmic terms, log (17/16) represents the power to which the base must be raised to obtain the value of 17/16. By combining the difference of the logarithms into a single logarithm, we have a more concise representation of the original expression.

To learn more about  logarithm - brainly.com/question/32543227

#SPJ11

Answer: A. (5,0)

Step-by-step explanation:

The correct statement is "Stores A and B have an equal spread." (option b).

To determine the spread of the data, we first need to find the range. The range is calculated by subtracting the smallest number from the largest number in a dataset.

For Store A:

The smallest number recorded is 2, and the largest number is 4. Therefore, the range of Store A is 4 - 2 = 2.

For Store B:

The smallest number recorded is 3, and the largest number is 5. Thus, the range of Store B is 5 - 3 = 2.

Comparing the ranges of both stores, we see that both Store A and Store B have the same range, which means the spread of the data is equal for both stores.

Therefore, the correct statement is:

b) Stores A and B have an equal spread.

To know more about range here

https://brainly.com/question/17440903

#SPJ4

Let X be a random variable, and K be a random variable which takes values in non-negative integers. It is given that K has density function G(k) such that G(0) = 0 and G(k-1) = g(k). Let z(k) be a non-negative, monotonic function such that E[x(K)] exists.

The expected value of the random variable X can be written as follows:$$E[X] = \sum_{k=0}^{\infty} x(k) G(k)$$Similarly, the expected value of the function z(K) can be written as follows:$$E[z(K)] = \sum_{k=0}^{\infty} z(k) G(k)$$By the definition of expectation, we can write the above as follows:

$$\int u dv = uv - \int v du$$$$\Rightarrow \int z(k-1) G(k-1) dk = z(k-1) G(k) - \int G(k) z'(k-1) dk$$Now we can write the above equation in summation notation and rearrange the terms as follows:$$\sum_{k=1}^{\infty} z(k-1) G(k-1) = \sum_{k=1}^{\infty} [z(k-1) - z(k)] G(k) + z(0) G(0)$$Substituting this in the expression for E[z(K)], we get:

$$E[z(K)] = \sum_{k=1}^{\infty} [z(k-1) - z(k)] G(k) + z(0) G(0)$$$$\Rightarrow E[z(K)] = z(0) G(0) + \sum_{k=1}^{\infty} [z(k-1) - z(k)] G(k)$$

To know more about variable visit:

https://brainly.com/question/15078630

#SPJ11

The tree's deviation from the vertical due to wind is 2°. At a distance of 42 meters from the tree's base, the angle of elevation to the top of the tree is 35°. To find the tree's height, we use trigonometry. By setting up and solving the appropriate equation, we can determine that the tree's height is obtained by multiplying the tangent of 88° by 42.

Angle of deviation from the vertical due to prevailing winds: 2°

Distance from the base of the tree: d = 42 meters

Angle of elevation to the top of the tree: a = 35°

To find the height of the tree, we can use trigonometry. Let's denote the height of the tree as h.

Drawing a diagram

Draw a diagram with a vertical line representing the tree, inclined at an angle of 2° from the true vertical. Mark a point 42 meters away from the base of the tree, and draw a line from that point to the top of the tree, forming an angle of 35° with the horizontal.

Setting up the trigonometric equation

In the right-angled triangle formed, the angle between the vertical line and the line connecting the point 42 meters away to the top of the tree is (90° - 2°) = 88°. Using trigonometric ratios, we can set up the following equation:

tan(88°) = h / 42

Solving for the height of the tree

Rearrange the equation to solve for h:

h = tan(88°) * 42

Using a scientific calculator or trigonometric table, find the value of tan(88°) and multiply it by 42 to calculate the height of the tree.

For more questions like Angle click the link below:

https://brainly.com/question/28451077

#SPJ11

y = 7x is the equation of the given table passing through the coordinate points used.

The formula for finding the equation of a line in slope-intercept form is expressed as:

y =mx + b

where:

m is the slope

b is the intercept

Determine the slope

slope = 14-7/2-1

slope = 7/1

slope = 7

Determine the y-intercept

y = mx + b

7 = 7(1) + b

7 = 7 + b

b = 0

Hence the required equation of the line passing through (1, 7) and (2, 14) is

y = 7x

Learn more on equation of a line here: https://brainly.com/question/18831322

#SPJ1

a.The statement lacks sufficient information or clarification to make a definitive judgment.

b.The statement is true.

c.The statement is false.

d. The statement is true.

a. False: The statement claims that B and C are irrelevant given "&". However, without additional context or information about what "&" represents, it is not possible to determine whether B and C are indeed irrelevant. The statement lacks sufficient information or clarification to make a definitive judgment.

b. True: The statement claims that Uncertainty A and Uncertainty C have both been observed when Decision D is made. If Uncertainty A and Uncertainty C are observed during the decision-making process for Decision D, it implies that these uncertainties play a role in the decision and contribute to the overall decision-making process. Therefore, the statement is true.

c. False: The statement suggests that Decision E is known before Decision D is made. However, the arrow of causality or influence typically indicates that Decision D influences Decision E, rather than the other way around. Without further information or a specific context, it is more reasonable to assume that Decision D precedes Decision E. Therefore, the statement is false.

d. True: The statement claims that the arrow between nodes C and D is an influence arrow. In graphical models or diagrams, arrows are commonly used to represent causal relationships or influences between variables or events. If the arrow between nodes C and D represents an influence, it implies that there is a causal connection from C to D. Therefore, the statement is true.

Learn more about uncertainty

brainly.com/question/15103386

#SPJ11

Answer:

[tex]192\pi \text{ ft}^2[/tex]

Step-by-step explanation:

We can see that the shaded section of the circle is 3/4 of the total circle. This can be checked by comparing the angles measure of the shaded section with the angle of the entire circle:

[tex]\dfrac{(360-90)\°}{360\°}[/tex]

[tex]=\dfrac{270}{360}[/tex]

[tex]=\dfrac{3}{4}[/tex]

We can find its area by multiplying 3/4 by the area of the entire circle.

[tex]A = \dfrac{3}{4} \cdot \pi r^2[/tex]

[tex]A=\dfrac{3}{4} \cdot \pi \cdot 16^2[/tex]

[tex]A = \dfrac{3}{4} \cdot \pi \cdot 256[/tex]

[tex]\boxed{A = 192\pi \text{ ft}^2}[/tex]

We have evidence to support the hypothesis that the mean weight for the whole batch is over 1.00 kg at a 5% significance level.

To determine if the given data supports the hypothesis that the mean weight for the whole batch is over 1.00 kg, we can perform a hypothesis test.

Let's denote the population mean weight of the sugar cartons as μ. The null hypothesis (H0) states that μ is less than or equal to 1.00 kg, while the alternative hypothesis (H1) states that μ is greater than 1.00 kg.

We will conduct a one-sample t-test to compare the sample mean to the hypothesized population mean.

Given the weights of the 11 randomly selected cartons:

1.02 kg, 1.05 kg, 1.08 kg, 1.00 kg, 1.00 kg, 1.06 kg, 1.08 kg, 1.01 kg, 1.04 kg, 1.07 kg, 1.00 kg

Let's calculate the sample mean (X) and the sample standard deviation (s) using these values:

X = (1.02 + 1.05 + 1.08 + 1.00 + 1.00 + 1.06 + 1.08 + 1.01 + 1.04 + 1.07 + 1.00) / 11

= 11.41 / 11

≈ 1.037 kg

s = √[([tex](1.02-1.037)^{2}[/tex] +[tex](1.05-1.037)^{2}[/tex] + ... + [tex](1.00-1.037)^{2}[/tex]) / (11 - 1)]

≈ 0.030 kg

Now, let's calculate the test statistic (t) using the formula:

t = (X - μ) / (s / √n)

Here, μ is the hypothesized population mean (1.00 kg), s is the sample standard deviation (0.030 kg), and n is the sample size (11).

t = (1.037 - 1.00) / (0.030 / √11)

≈ 2.178

Next, we need to find the critical value for a one-tailed t-test with 10 degrees of freedom (11 - 1 = 10) at a significance level of 0.05. Looking up the critical value in a t-table, we find it to be approximately 1.812.

Since the calculated test statistic (t = 2.178) is greater than the critical value (1.812), we reject the null hypothesis.

Therefore, based on the given data, we have evidence to support the hypothesis that the mean weight for the whole batch is over 1.00 kg at a 5% significance level.

To learn more about hypothesis here:

https://brainly.com/question/30821298

#SPJ4

(a) The function f(2, y, z) = 12y + 20z represents the amount of steel used for the rectangular storage container with dimensions 2, y, and z. (b) The container will use the least amount of steel when y = √5/2 and z = 3/√5, satisfying the volume constraint.

(a) The function f(2, y, z) represents the amount of steel used to build the storage container with dimensions 2, y, and z.

The amount of steel used for each component of the container can be calculated as follows

Sides: 2 sheets thick, so the area of each side is 2 * 2 = 4 square meters.

Bottom: 3 sheets thick, so the area of the bottom is 3 * 2 = 6 square meters.

Front and back: 1 sheet thick, so the area of each front and back is 1 * 2 = 2 square meters.

The total amount of steel used can be obtained by summing up the areas of all components

f(2, y, z) = 2(4y + 4z) + 2(2y) + 6(2z)

Simplifying further

f(2, y, z) = 8y + 8z + 4y + 12z

= 12y + 20z

Hence, the function f(2, y, z) for the amount of steel used to build the storage container is given by

f(2, y, z) = 12y + 20z

(b) To determine the values of y and z that will minimize the amount of steel used, we need to minimize the function f(2, y, z).

Since the volume of the container is fixed at 3 cubic meters, we have:

2 * y * z = 3

From this equation, we can express y in terms of z

y = 3 / (2z)

Substituting this expression into the function f(2, y, z)

f(2, y, z) = 12y + 20z

= 12(3 / (2z)) + 20z

= 36 / z + 20z

To find the values of z that minimize f(2, y, z), we can take the derivative of f with respect to z and set it to zero

df/dz = -36/z² + 20 = 0

Solving this equation for z, we get

36/z² = 20

z² = 36/20

z² = 9/5

z = √(9/5) = 3/√5

Since y = 3 / (2z), we can substitute the value of z

y = 3 / (2 * 3/√5) = √5/2

Hence, the storage container will be made out of the least amount of steel when y = √5/2 and z = 3/√5.

To know more about volume:

https://brainly.com/question/25422723

#SPJ4

The average change in distance for each increase of 1 in the iron number is of -5 yards, representing the slope of the linear function.

The slope-intercept equation for a linear function is presented as follows:

y = mx + b

The coefficients m and b represent the slope and the intercept, respectively, and are explained as follows:

From the graph given at the end of the answer, when x increases by 1, y decays by 5, hence the slope m is given as follows:

m = -5.

The graph is given by the image presented at the end of the answer.

More can be learned about linear functions at https://brainly.com/question/15602982

#SPJ1

The new dimensions of each enlarged block in the Mechlinburg  subdivision  660 feet by 2250 feet.

The new dimensions of each enlarged block in the subdivision, to multiply the dimensions of a standard Manhattan block by 2.5.

The standard size of a Manhattan city block is given as 264 feet by 900 feet.

Original dimensions of a standard Manhattan block:

Length = 264 feet

Width = 900 feet

To find the new dimensions,  2.5:

New width = 264 feet  ×2.5 = 660 feet.

New length = 900 feet ×2.5 = 2250 feet.

To know more about dimensions here

https://brainly.com/question/31106945

#SPJ4

Based on the given data and a significance level of 0.05, there is sufficient evidence to support the drug company's claim that less than 10% of users of its allergy medicine experience drowsiness.

Let's perform the hypothesis test using the provided data.

For a significance level of 0.05:

Null hypothesis (H0): p >= 0.10

Alternative hypothesis (Ha): p < 0.10

Using the given data, p = 0.04, p0 = 0.10, and n = 75, we can calculate the test statistic (Z-score):

Z = (0.04 - 0.10) / sqrt(0.10 * (1 - 0.10) / 75) ≈ -2.12

Assuming a normal distribution, the p-value is approximately 0.0174.

Since the p-value (0.0174) is less than the significance level of 0.05, we reject the null hypothesis. There is sufficient evidence to conclude that the proportion of users experiencing drowsiness is less than 10% based on the given data at a 0.05 level of significance.

Now let's consider a significance level of 0.01:

Null hypothesis (H0): p >= 0.10

Alternative hypothesis (Ha): p < 0.10

Using the same data, we calculate the test statistic (Z-score) as before:

Z = (0.04 - 0.10) / √(0.10 * (1 - 0.10) / 75) ≈ -2.12

Again, we find the p-value associated with the test statistic. For a one-tailed test, the p-value is the probability of observing a Z-score less than -2.12. Assuming a normal distribution, the p-value is still approximately 0.0174.

Since the p-value (0.0174) is greater than the significance level of 0.01, we fail to reject the null hypothesis. There is insufficient evidence to conclude that the proportion of users experiencing drowsiness is less than 10% based on the given data at a 0.01 level of significance.

To know more about significance here

https://brainly.com/question/31070116

#SPJ4

The length of the segment BP of the chord BD is 5.25 inches.

Given a circle Z.

AC and BD are the chords.

Two chords intersect at the point P.

By Intersecting Chords theorem, if two chords are intersected at a point, then the products of the lengths of segments are equal.

Using this theorem,

AP . PC = BP . PD

3.5 × 6 = 4 × BP

Solving,

BP = 5.25 inches

Hence the length is 5.25 inches.

Learn more about Chords here :

https://brainly.com/question/31207787

#SPJ1

The side length of the square technology chip is 2 centimetres.

A square is a quadrilateral with 4 sides equal to each other. The sum of angles in a square is 360 degrees. The opposite sides of a square are parallel to each other.

Therefore, the square technology chip has an area of 4 square centimetres. The length of the side of the chip can be found as follows:

area of the square chip = l²

where

Hence,

4 = l²

square root both sides of the equation

l = √4

l = 2 cm

Therefore,

side length of the square technology chip = 2 cm

learn more on square here: https://brainly.com/question/11362963

#SPJ1

According to the given question we have The equivalent logarithmic equation to 5.2 – = h is ln(e 5.2) = 5.2, and the value of h is approximately 0.0067.

The logarithmic equivalent of e 5.2 is ln(e 5.2). 5.2 – = h as an equivalent logarithmic equation can be solved using the properties of logarithms.

In order to solve this, first we need to take the natural logarithm of both sides. ln(5.2–) =

ln(h)ln(e 5.2) can be evaluated by using the properties of logarithms as follows: ln(e 5.2) = 5.2 (because ln(e) = 1)

Thus, the logarithmic equivalent of e 5.2 is ln(e 5.2) = 5.2.

Furthermore, the value of ln(5.2–) can be found by using the property of logarithms that ln(a–) = -ln(a).

Therefore, ln(5.2–) = -ln(5.2).We can then substitute the value of ln(e 5.2) and ln(5.2–)

to obtain the final logarithmic equation: -ln(5.2) = ln(h) -5.2 = ln(h)Finally, we can exponentiate both sides to solve for h:

eh = e-5.2h = e-5.2 ≈ 0.0067

Therefore, the equivalent logarithmic equation to 5.2 – = h is ln(e 5.2) = 5.2, and the value of h is approximately 0.0067.

To know more about Logarithmic  visit :

https://brainly.com/question/30226560

#SPJ11

The exact solution of the given equation is 2x² - 2x + 5y² + 18y = C.

What is exact solution of differential equation?

Exact equations are certain differential equations that meet requirements, making it easier to find the solutions to them.

As per question given that,

Gerneral differential equation is,

(2x - 1) dx + (5y + 9) dy = 0

By comparing equation,

Mdx +Ndy = 0

Here,

M = 2x - 1

N = 5y + 9

Now finding the partial derivatives are,

dM / dy = d (2x -1) / dy

From derivative formula: [d (constant) / dy = 0]

Apply formula,

dM / dy = 0          ...... (1)

Similarly,

dN / dx = d (5y + 9) / dx

Differentiate partially with respect to x. keeping y is constant.

dN / dx = 0          ......(2)

Equate both equations (1) and (2),

dM / dy = dN / dx

The given differential equation is exact.

Then the general solution is,

∫ M dx + ∫ N dy = C

Substitute values respectively,

∫ (2x - 1) dx + ∫ (5y + 9) dy = C

∫ (2x) dx - ∫ dx + ∫ (5y) dy + ∫ 9 dy = C

2· x² / 2 - x + 5· y² / 2 + 9y = C

x² - x + 5· y² / 2 + 9y = C

Simplify terms,

2x² - 2x + 5y² + 18y = C.

Which is required solution.

Hence, the exact solution of the given equation is 2x² - 2x + 5y² + 18y = C.

To learn more about general solution of differential equation from the given link.

https://brainly.com/question/17004129

#SPJ4

The least square solution for the given system is [a b c d] = [4 2 -2 2].Therefore, the answer is option D.

The given matrix equation is:

[-1 4 4 11] [a b c d]ᵀ

= [2 -3 2 12 1 3 2] ᵀ  [a b c d]ᵀ

= [2  -3 2]ᵀ [1  3 2]ᵀ [4  12 2]ᵀ [11] ᵀ

To solve this least squares solution, we need to solve the normal equation given as:

Aᵀ Ax = Aᵀ b, where

A = [ -1  4  4  11 -2  3  2  12  1  3  2]and

b = [ 2 -3  2 12  1  3  2]

Transpose of matrix A: Aᵀ= [ -1 -2 1 4 3 4 2 11 2 12 2]

Multiplying Aᵀ with A gives us the following result:

Aᵀ A = [30 0 0 0 0 38 12 88 12 88 21]

Multiplying Aᵀ with b gives us the following result:

Aᵀ b = [-12 -3 7]

Let's solve the normal equation, Ax = b,

where x = [a b c d]ᵀ(Aᵀ A)

x = Aᵀ b[30 0 0 0 0 38 12 88 12 88 21][a b c d]ᵀ

= [-12 -3 7]

Simplifying the above matrix equation, we get the following result:

[30a + 38b + 12c + 88d + 2e = -12][38a + 88b + 12c + 88d + 6e = -3][12a + 12b + 21c = 7]

We have three equations and four variables; let's assume the value of d as 2.

Substitute the value of d in the first and second equation, and simplify. We get the following results:

[30a + 38b + 12c + 88(2) + 2e = -12

=> 30a + 38b + 12c + 2e = -196][38a + 88b + 12c + 88(2) + 6e = -3

=> 38a + 88b + 12c + 6e = -179]

Now, using the third equation, we can eliminate the variable 'c':

[12a + 12b = 7 - 21c

=> 4a + 4b = 7 - 7c]

Let's substitute the value of c in the first two equations and simplify:

[30a + 38b + 12(4a + 4b - 7)/2 + 2e = -196

=> 34a + 43b + e = -211][38a + 88b + 12(4a + 4b - 7)/2 + 6e = -179

=> 43a + 97b + 3e = -395]

Solving the above system of equations using any method (substitution, elimination, or matrix method), we get a = 4 and b = 2.

Substituting the values of a and b in the equation 4a + 4b = 7 - 7c,

we get c = -2.

The value of d is already given as 2.

Therefore, the least square solution for the given system is [a b c d] = [4 2 -2 2].

Therefore, the answer is option D.

To know more about matrix visit:

https://brainly.com/question/29132693

#SPJ11

A) To graph the polar equation r = 4 - 6sin(θ), we can use a graphing utility that supports polar coordinates. Here's the graph:

[Graph of the polar equation r = 4 - 6sin(θ)]

B) To find the area of the given region, we need to evaluate the integral of 1/2 * r^2 dθ over the interval where the graph of the equation r = 4 - 6sin(θ) is traced.

The region enclosed by the inner loop of the polar equation can be defined by the range of θ where the equation produces positive values of r.

To find the range of θ, we solve the equation 4 - 6sin(θ) > 0:

6sin(θ) < 4

sin(θ) < 4/6

sin(θ) < 2/3

Since sin(θ) is positive in the first and second quadrants, we can set up the following inequality:

0 < θ < arcsin(2/3)

Now, we can find the area by evaluating the integral:

A = (1/2) ∫[0 to arcsin(2/3)] (4 - 6sin(θ))^2 dθ

Using a numerical method or a calculator, we can compute the definite integral to find the area of the region. The result will be a decimal value rounded to four decimal place

To know more about quadrants visit:

brainly.com/question/26426112

#SPJ11