Find the solution to the initial value problem
y′′+8y′+16=0, y(−1)=2, y′(−1)=3.

Answers

Answer 1

Answer:

y = (11x + 13)e^(-4x-4)

Step-by-step explanation:

Given y'' + 8y' + 16 = 0

The auxiliary equation to the differential equation is:

m² + 8m + 16 = 0

Factorizing this, we have

(m + 4)² = 0

m = -4 twice

The complimentary solution is

y_c = (C1 + C2x)e^(-4x)

Using the initial conditions

y(-1) = 2

2 = (C1 -C2) e^4

C1 - C2 = 2e^(-4).................................(1)

y'(-1) = 3

y'_c = -4(C1 + C2x)e^(-4x) + C2e^(-4x)

3 = -4(C1 - C2)e^4 + C2e^4

-4C1 + 5C2 = 3e^(-4)..............................(2)

Solving (1) and (2) simultaneously, we have

From (1)

C1 = 2e^(-4) + C2

Using this in (2)

-4[2e^(-4) + C2] + 5C2 = 3e^(-4)

C2 = 11e^(-4)

C1 = 2e^(-4) + 11e^(-4)

= 13e^(-4)

The general solution is now

y = [13e^(-4) + 11xe^(-4)]e^(-4x)

= (11x + 13)e^(-4x-4)


Related Questions

A 12-ft ladder leaning against a house makes a 64 degree angle with the ground. Will the ladder reach a window sill that is 10.5 ft up from the base of the house?

Answers

Answer:

Yes, it will

Step-by-step explanation:

Given

Length of Ladder = 12 ft

Angle = 64

Required

Determine if it'll reach a height of 10.5ft from the base

See attachment for proper illustration.

From the attachment, we want to determine that x be greater than 10.5

Using sin formula:

[tex]Sin\ 64 = \frac{x}{12}[/tex]

Multiply through by 12

[tex]x = 12 * sin\ 64[/tex]

[tex]x = 12 * 0.8988[/tex]

[tex]x = 10.79[/tex] (Approximated)

Since 10.79 is greater than 10.5, then the ladder will reach the window

sin64 = x/12

x = 12* sin64

How to do this?
No 5

Answers

Answer:

M=24

Step-by-step explanation:

because 2+3+6x2=24

plss help asap im on a time limit

Answers

Answer: the first one

Step-by-step explanation: just trust me ;)

It’s a Good Friday, a Friday with no school

What value of q makes the equation true? -8=32-5q

Answers

Answer:

8

Step-by-step explanation:

ILL GIVW YOU BRAINLIST !!! HAVE TO GET IT RIGHT !!!! SHOW WORK

my - 2x

m=3 , y=6 , x = 8

Answers

Answer:

2

Work is shown in picture

Sofia ordered sushi for a company meeting. They change plans and increase how many people will be at the
meeting, so they need at least 100 pieces of sushi in total.
Sofia had already ordered and paid for 24 pieces of sushi, so she needs to order additional sushi. The sushi
comes in rolls, and each roll contains 12 pieces and costs $8.
Let R represent the number of additional rolls that Sofia orders.

Answers

Answer: D: 24 + 12R ≥ 100

Now, look at the set of integers. Complete the table for the closure property if integers under the four operations.

Answers

Answer:

See below.

Step-by-step explanation:

Addition: closed

Example: -5 + 10 = 5, and -5, 10, and 5 are all integers

Subtraction: closed

Example: 10 - 8 = 2, and 10, 8, and 2 are all integers

Multiplication: closed

Example: -4 * 7 = -28, and -4, -7 and -28 are all integers

Division: not closed

Example: 5/2 = 2.5, and 2.5 is not an integer, although 2 and 5 are integers

The set of integers is closed under addition, subtraction, and multiplication because any addition, subtraction, or multiplication of integers always results in an integer.

The set of integers is not closed under division because a division of integers does not always result in an integer.

O produtor rural Ricardo Antunes Peixoto, 55 anos, teve uma surpresa enquanto perfurava um poço artesiano em sua fazenda, na zona rural de Brasília de Minas (MG). "Não saiu água, mas saiu fogo", diz, espantado. Uma equipe com cinco operários de uma empresa especializada trabalhou durante dois dias na propriedade para abrir o poço de água, mas, após escavarem 204 metros, o que encontraram foi um produto inflamável, que seria gás natural. O dono da fazenda Lagoa Misteriosa espera lucrar com a descoberta da reserva de gás. "Pelo menos, que se têm notícias no estado, este é o primeiro caso. Agora, com o dinheiro que eu vender o gás, vou abrir [um novo poço] para ter a minha água". Disponível em: . Acesso em: 12 abr. 2013. Considerando a combustão completa do metano, nas CNTP, determine a energia liberada na queima de 224 L de metano que foi em encontrado no poço desse agricultor. Dados: C–H = 416 kJ/mol C?O = 805 kJ/mol O?O = 498 kJ/mol O–H = 464 kJ/mol A. –2 660 kJ/mol B. –8 060 kJ/mol C. –1 220 kJ/mol D. –4 030 kJ/mol E. –2 600 kJ/mol

Answers

O produtor rural Ricardo Antunes Peixoto, 55 anos, teve uma surpresa enquanto perfurava um poço artesiano em sua fazenda, na zona rural de Brasília de Minas (MG). "Não saiu água, mas saiu fogo", diz, espantado. Uma equipe com cinco operários de uma empresa especializada trabalhou durante dois dias na propriedade para abrir o poço de água, mas, após escavarem 204 metros, o que encontraram foi um produto inflamável, que seria gás natural. O dono da fazenda Lagoa Misteriosa espera lucrar com a descoberta da reserva de gás. "Pelo menos, que se têm notícias no estado, este é o primeiro caso. Agora, com o dinheiro que eu vender o gás, vou abrir [um novo poço] para ter a minha água". Disponível em: . Acesso em: 12 abr. 2013. Considerando a combustão completa do metano, nas CNTP, determine a energia liberada na queima de 224 L de metano que foi em encontrado no poço desse agricultor. Dados: C–H = 416 kJ/mol C?O = 805 kJ/mol O?O = 498 kJ/mol O–H = 464 kJ/mol A. –2 660 kJ/mol B. –8 060 kJ/mol C. –1 220 kJ/mol D. –4 030 kJ/mol E. –2 600 kJ/mol

A computer software company conducted a telephone survey asking its customers how the software could be improved. Assume the survey was conducted by asking the questions below. Each of the questions defines a variable of interest to the company. Classify the data generated for each variable as quantitative or qualitative. Justify your classification.

Required:
a. Is the variable of interest defined by the question "How many hours per week do you use our software?" quantitative or qualitative?
b. Is the variable of interest defined by the question "For how many years have you been using our software?" quantitative or qualitative?

Answers

Answer:

Quantitative

Quantitative

Step-by-step explanation:

Given the following research questions to classify:

a. Is the variable of interest defined by the question "How many hours per week do you use our software?

This is a quantitative variable, because the question requires a numerical response such as 5. 10, 2 4 and so on upon which numerical or statistical calculations such as addition, subtraction, range, mean and so on can be performed.

B.) For how many years have you been using our software?

This is also a quantitative variable as the question expects a response of Numeric characteristic such as 2, 3 and so on depending on the number of years the respondent has been using the software

rational or irrational 0.135135135135

Answers

Answer: it is a rational

Step-by-step explanation:

Solve the following system of equations algebraically:
y= 16x2 + 9x – 5
y = –2 – 6

Answers

Step-by-step explanation:

Is the x between 16 and 2 for multiplication or are you using it as a variable??

For f(x)=-x^2-2x-2, find f(x+h)-f(x)/h

Answers

see the both photos for answer

Solve for r:
B=dPIEr^2

Answers

Answer:

C

Step-by-step explanation:

So we have the equation:

[tex]B=d\pi r^2[/tex]

And we want to solve for r.

So first, isolate the r variable. Divide both sides by dπ. So:

[tex]\frac{B}{d\pi}=\frac{d\pi r^2}{d\pi}[/tex]

The right side cancels:

[tex]\frac{B}{d\pi}=r^2[/tex]

Take the square root of both sides:

[tex]r=\sqrt\frac{B}{d\pi}[/tex]

We can rearrange the terms:

[tex]r=\sqrt\frac{B}{\pi d}[/tex]

Our answer is C.

What is 24.541 divided by 6

Answers

i think the answer is 4.09

There is a number such that four times the number plus 3 is equal to 19. Find the number.

Answers

The answer is 4 because 4x4 is 16, and 16 plus 3 equals 19

An equation is formed of two equal expressions. The number is 4.

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Given that there is a number such that four times the number plus 3 is equal to 19.

Let the number be M.

Given that there is a number such that four times the number plus 3 is equal to 19. Therefore, We can write it as,

4M + 3 = 19

Now, we can write,

4M + 3 = 19

Subtract 3 on both sides
4M + 3 - 3 = 19 - 3

4M = 16

Divide both sides by 4,

4/4 M = 16/4

M = 4

Thus, the number is 4.

Learn more about Equation here:

https://brainly.com/question/14686792

#SPJ2

solve the equation (5x-7)(-3x+2)

Answers

Answer:

[tex]\large\boxed{-15x^{2} + 31x - 14}[/tex]

Step-by-step explanation:

(5x - 7)(-3x + 2)

The values inside of the parenthesis cannot be simplified, so distribute and multiply.

Distribute

(5x - 7)(-3x) + (5x - 7)(2)

Multiply

-15x² + 21x + 10x - 14

Add 21x to 10x

-15x² + 31x - 14

[tex]\large\boxed{-15x^{2} + 31x - 14}[/tex]

Hope this helps :)

what is 327 divided by 55

Answers

Answer:

[tex]5\frac{52}{55}[/tex]

Step-by-step explanation:

[tex]\frac{327}{55}=5\quad \mathrm{Remainder}\quad \:52\\\\\mathrm{Convert\:to\:mixed\:number:\:Quotient\frac{Remainder}{Divisor}}\\\\\frac{327}{55}=5\frac{52}{55}\\\\5\frac{52}{55}[/tex]

5.94545454... because google said so


Marcie wants to find the total number of students with black hair in the freshman class at her school. She has observed 5 of the 9 freshman homerooms. The graph shows the number of students
with black hair she has counted so far. Based on this information, which is the best protection of the total number of students with black hair and then 9 freshman homerooms at Marcie's school?

Answers

Answer: 1/8

Step-by-step explanation: 9/5 = 1/8

Samara Park gets $0.25 for each pound of apricots she dries. How much will she be paid if she dries 16.4 pounds?

Answers

4.100 good luck :))))))))))

Samara will be paid $4.10 for drying 16.4 pounds of apricots.

How to calculate payment?

To calculate the payment for the purchase of the item, we can use the formula:

Payment = Rate × Amount

Here, the rate is the amount paid per pound and the amount is the total number of pounds item.

To calculate Samara's payment for drying apricots, we can use the formula:

Payment = Rate × Amount

As per the question, the rate is $0.25 per pound, and the amount is 16.4 pounds.

So, substitute these values into the formula:

Payment = $0.25 × 16.4

Multiply $0.25 by 16.4:

Payment = $4.10

Therefore, Samara will be paid $4.10 for drying 16.4 pounds of apricots.

Learn more about the payments here:

https://brainly.com/question/6593069

#SPJ2

Match the vocabulary to the correct operation PLZ ANSWER:(

Answers

Product=multiplication
Sum=addition
Difference=subtraction
Quotient=division
Quantity=parentheses

Solve each system of equations of equations.

x + y = -6

2x - y = 3​

Answers

Answer:

x = -1, y = -5

Step-by-step explanation:

x + y = -6

2x - y = 3​

Add the two equations together to eliminate y

x + y = -6

2x - y = 3​

------------------

3x =  -3

Divide by 3

3x/3 = -3/3

x = -1

Now find y

x+y = -6

-1+y = -6

Add 1 to each side

-1+1 +y = -6+1

y = -5

Plz help me I’m md lost rn!

Answers

Answer:

6.4 km

Step-by-step explanation:

4x1.6

Answer:

6.4 km

Step-by-step explanation:

1.6 * 4 = 6.4

Solve for y in terms of x. Determine if y is a function of x. If it is, rewrite using f(x) notation. If not, enter ND in the answer field.

7x-5y=2

Answers

Answer:

y =  (7x-2)/5

Step-by-step explanation:

Given the expression 7x-5y = 2, we are to write y in terms of x. to do that, we will have to make y the subject of the formula from the given expression as shown;

7x-5y = 2

subtract 7x from both sides of the equation

7x-5y-7x = 2-7x

-5y = 2-7x

Multiply through by minus sign

-(-5y) = -(2-7x)

5y = -2+7x

5y = 7x-2

Divide both side by 5;

5y/5 = (7x-2)/5

y =  (7x-2)/5

Hence the expression y as a function of x is given as y =  (7x-2)/5

(Select all that Apply)
Which of the following is an equation?
O 11=11
6+5=11
6 +5 – 11
06-5=11

Answers

B: 6 + 5 = 11

six plus five does equal 11 and an EQUAtion needs to EQUAL :) ❤️
6 + 5 = 11 !
it’s simple addition ,, just add 6 to 5 & you got your answer .

1. GIVE ANOTHER NAME FOR CM?

Answers

Answer:

decimetre is the answer

write the equation of the parabola in vertex form vertex (0,0) passes through (2,1)

Answers

Answer:

[tex]f(x)=\frac{1}{4}x^2[/tex]

Step-by-step explanation:

Recall the vertex form of a quadratic equation:

[tex]f(x)=a(x-h)^2+k[/tex]

Where (h,k) is the vertex.

We are told that the vertex is (0,0). Therefore:

[tex]f(x)=a(x-0)^2+(0)[/tex]

Simplify:

[tex]f(x)=ax^2[/tex]

So, to finish the equation, we need to find a.

We know that a point is (2,1). Thus, substitute 1 for f(x) and 2 for x:

[tex]1=a(2)^2[/tex]

Square:

[tex]1=4a[/tex]

Divide both sides by 4:

[tex]a=\frac{1}{4}[/tex]

So, our a value is 1/4.

And we can thus complete our equation:

[tex]f(x)=\frac{1}{4}x^2[/tex]

And we are done :)

What is the median of 6.5, 4.5, 6.5, 4.5, 5, 4.5, 9, 3.5

Answers

4.75 is the answer list from least to greatest find the number in the middle

7/5 mile / 2/3 hour worked out please

Answers

Steps to solve:

7/5 ÷ 2/3

~Dot

7/5 * 2/3

~Flip

7/5 * 3/2

~Multiply

21/10

Best of Luck!

Answer:

21/10 = 2.1 mile/hour

Step-by-step explanation:

(a/b) ÷ (c/d) = (a*d) ÷ (b*c)

then:

(7/5) ÷ (2/3) = (7*3) ÷ (5*2) = 21/10 mile/hour

The median of 32,,21,60,3,5,17

Answers

Answer:

19

Step-by-step explanation:

Answer: 19

Explanation:

Write the number in ascending form:

3,5,17,21,32,60

Find median:

Median = (17+21)/2 = 38/2 = 19

When did the United States first establish its measuring system, and who was responsible for
picking the system?

Answers

Answer:

1975 Thomas Jefferson

Step-by-step explanation:

Other Questions
What does this diagram represent? (4 points) A glycerol molecule losing an H atom, and a fatty acid chain losing OH, forming H2O. 1. A saturated fat becoming unsaturated 2. A fat molecule forming through dehydration synthesis 3. The saturation of a triglyceride molecule 4. Dehydration synthesis breaking down a fat molecule What is the difference between checks and balances and separation of powers and why are they important? Who came up with these concepts? Round the following numbers to the number of significant figures indicated:345 (2 s.f.) ___________7850 (1 s.f.)___________24.68 (3 s.f)___________8.005 (3 s.f)___________0.005758 (3 s.f)___________1.25x1012 (2 s.f)___________ Explain the advantages and disadvantages of using surveys for data collection. A ball is thrown into the air. Its height (in feet) t seconds later is given by h(t)=64t16t^2 a) What is the height of the ball 1 second after it has been thrown? b) After how many seconds does the ball hit the ground? c) At what time(s) is the ball 30 feet above the ground? What is the following correct way to write 2,330,000 in scientific notation Which of the following is true about REST?A- In REST architecture, a REST Server simply provides access to resources and REST clientaccesses and presents the resources.B- Each resource is identified by URIs/ global IDs.C- REST uses various representations to represent a resource like text, JSON and XML.D- All of the above. What is the largest multiple of 17 which is less than 1000? Forten Company, a merchandiser, recently completed its calendar-year 2015 operations. For the year, (1) all sales are credit sales, (2) all credits to Accounts Receivable reflect cash receipts from customers, (3) all purchases of inventory are on credit, (4) all debits to Accounts Payable reflect cash payments for inventory, and (5) Other Expenses are paid in advance and are initially debited to Prepaid Expenses. The companys income statement and balance sheets follow. FORTEN COMPANY Comparative Balance Sheets December 31, 2015 and 2014 2015 2014 Assets Cash $ 49,800 $73,500 Accounts receivable 65,810 50,625 Inventory 275,656 251,800 Prepaid expenses 1,250 1,875 Total current assets 392,516 377,800 Equipment 157,500 108,000 Accum. depreciationEquipment (36,625) (46,000) Total assets $ 513,391 $439,800 Liabilities and Equity Accounts payable $ 53,141 $114,675 Short-term notes payable 10,000 6,000 Total current liabilities 63,141 120,675 Long-term notes payable 65,000 48,750 Total liabilities 128,141 169,425 Equity Common stock, $5 par value 162,750 150,250 Paid-in capital in excess of 37,500 0 par, common stock Retained earnings 185,000 120,125 Total liabilities and equity $ 513,391 $439,800 FORTEN COMPANY Income Statement For Year Ended December 31, 2015Sales $ 582,500 Cost of goods sold 285,000 Gross profit 297,500 Operating expenses Depreciation expense $ 20,750 Other expenses 132,400 153,150 Other gains (losses) Loss on sale of equipment (5,125) Income before taxes 139,225 Income taxes expense 24,250 Net income $ 114,975 Additional Information on Year 2015 Transactionsa. The loss on the cash sale of equipment was $5,125 (details in b).b. Sold equipment costing $46,875, with accumulated depreciation of $30,125, for $11,625 cash.c. Purchased equipment costing $96,375 by paying $30,000 cash and signing a long-term note payable for the balance.d. Borrowed $4,000 cash by signing a short-term note payable.e. Paid $50,125 cash to reduce the long-term notes payable.f. Issued 2,500 shares of common stock for $20 cash per share.g. Declared and paid cash dividends of $50,100. Required:1. Prepare a complete statement of cash flows; report its operating activities using the indirect method. if a number is negative, then its opposite will be: Your lab partner accidentally spills some acid on his wrist and watchband. You should: (Check all that apply.) Correctly match each scenario relating to probable future losses that exist at the balance sheet date with the correct accounting treatment._____Amount of future loss cannot be reasonably estimated_____Amount of future loss can be reasonably estimateda. Accrueb. Disclose only What is the mass of 2.86 moles of silver (Ag)? The relative growth rate for a certain type of bacteria population is 85% per hour. A small culture has formed and in just 2 hours the count shows to be 12,500 bacteria in the culture. What is the initial number of bacteria in the culture? 3.A gardenar wishes to plant 6096 plants in the form of a square and found that therewere 12 plants left. How many plants were planted in each row. Write 0.36 Repeating as a fraction in simplest form what is an example of health behavior A football field is supposed to be exactly 120yd long, including the end zones. How many inches is this? fear of sunlight is know as what are four places a scientist can go to find information about a problem