You likely mean to write the differential equation,
y'' - 2y' + y = exp(x)
The homogeneous part
y'' - 2y' + y = 0
has characteristic equation
r² - 2r + 1 = (r - 1)² = 0
with a root at r = 1 with multiplicity 2, so the characteristic solution is
y = C₁ exp(x) + C₂ x exp(x)
For the particular solution, we assume an ansatz
y = ax² exp(x)
where a is an unknown constant. Differentiating the ansatz twice:
y' = ax² exp(x) + 2ax exp(x) = (ax² + 2ax) exp(x)
y'' = (ax² + 2ax) exp(x) + (2ax + 2a) exp(x) = (ax² + 4ax + 2a) exp(x)
Substitute y and its derivatives into the DE:
(ax² + 4ax + 2a) exp(x) - 2 (ax² + 2ax) exp(x) + ax² exp(x) = exp(x)
Solve for a :
(ax² + 4ax + 2a) - 2 (ax² + 2ax) + ax² = 1
2a = 1
a = 1/2
Then the particular solution is
y = 1/2 x² exp(x)
The general solution is then
y = C₁ exp(x) + C₂ x exp(x) + 1/2 x² exp(x)
Layla missed 38 questions on her multiple choice math final that had a total of 200 problems. What percentage of questions did Layla answer correctly?
Answer:
81%
Step-by-step explanation:
200-38= 162
162/200= 81/100
81%
I Keep getting different number help plz
Answer:
x = 2
Step-by-step explanation:
(4+3x)/2 = 5
4+3x = 10
3x = 6
x = 2
Answer:
the answer is two
Step-by-step explanation:
4/2 3x/2=5
2+1.5x=5
-2. -2
1.5x=3
————
1.5. 1.5
3/1.5=2
Solve the system of equations -6x-y=-16 and -6x-5y=-8 by combining equations
Answer:
[tex]\left \{ {{y=-2} \atop {x=3}} \right.[/tex]
Step-by-step explanation:
[tex]\left \{ {{-6x - y = -16} \atop {-6x - 5y = -8}} \right. <=> \left \{ {{4y= -8} \atop {-6x-5y =-8}} \right. <=> \left \{ {{y=-2} \atop {-6x-5y=-8}} \right. <=> \left \{ {{y=-2} \atop {-6x-5*(-2)=-8}} \right. <=> \left \{ {{y=-2} \atop {-6x=-18}} \right. <=> \left \{ {{y=-2} \atop {x=3}} \right.[/tex]
The area of a circle is equal to 1 dm2. Find the radius of the circle.
Answer:
2000
Step-by-step explanation:
1 dm =1000
2dm =?
2dm x 1000
1dm
2000
Help help help math math math
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
A water tank is filled at a constant rate. After 36 minutes, there are 648 gallons of water in the tank. How many gallons of water flowed into the tank each minute? Use the model.
Answer:
I'm not sure about this, sorry!
Step-by-step explanation:
[tex]648 \div 36 = 18[/tex]
18 gallons of water flowed into the tank each minute.
Answer: the answer is 18 gallons
Step-by-step explanation: all you have to do is divide 648 by 36 and you should recieve an answer of 18
Manny borrowed $800 at 10% annual interest. How much interest did he owe in one year?
Answer:
80
Step-by-step explanation:
Algebra 1
What is the greatest possible error for a measurement of 4 inches?
inches
Question 7
Charlie asked a random sample of both boys and girls how much time they had spent on math homework that week. Charlie displayed his data in the box plots below
Minutes Spent on Homework
Boys
Girls
10 20 30
50 60 70
Which statement is a correct inference based on this data?
А
The amount of time spent on homework is less variable for the boys than for the girls
B
The amount of time spent on homework is generally greater for the boys than for the girls
С
The percentage of boys who spent less than the median amount of time on homework is less than the percentage of girls who spent less than the median
D
The data for the boys has a greater range of values than does the data for the girls
62021 Iluminate Education, Inc
The percentage of boys who spent less than the median amount of time is less than the number of girls who spent less than the median amount of time in doing the homework.
The median is a measure of central tendency. The median of a given data set shows the middle number in a given set of scores when they arranged in ascending or descending order.
The box plots in the question shows the random sample of both boys and girls how much time they had spent on math homework in a week. We can see from the box plot that the percentage of boys who spent less than the median amount of time is less than the number of girls who spent less than the median amount of time in doing the homework.
Learn more about median; https://brainly.com/question/300591
movie theater charges $9 for adults and $7 for senior citizens. On a day when 325 people paid an admission, the total receipts were $2504. How many were seniors and how many were adults?
I will set it up.
Let a = adults
Let s = seniors
The first equation is a + s = 325.
The second equation is 9a + 7s = 2504.
Here is your system of equations:
{a + s = 325
{9a + 7s = 2504
Take it from here.
Select the correct answer. Find the intersection point for the following linear functions. f(x) = 2x + 3 g(x) = -4x − 27
Answer:
(-5,-7)
Step-by-step explanation:
Set functions equal to each other.
2x+3= -4x-27
2x+4x = -3-27
6x=-30
x= -5
f(-5) = 2(-5) +3
f(-5) =-10+3 y= - 7
g(-5) = -4(-5) -27
g(-5) =20-27 y= -7
x=-5 y=-7
(-5,-7)
Answer:
(-5,-7)
Step-by-step explanation:
What percent of 111 is 94?
Answer:
I’d say 84.68%
Can somebody pls solve this equation my brain hurts.
through: (-5,1), parallel to y = -2/3x +2
Answer:
y = -2/3x-1
Step-by-step explanation:
1 What is the universe made of? ...
2 How did life begin? ...
3 Are we alone in the universe? ...
4 What makes us human? ...
5 What is consciousness? ...
6 Why do we dream? ...
7 Why is there stuff? ...
8 Are there other universes?
1. big planets and carbon dioxide
2. when god sent adam (the first human being) to earth and had a female with him they got married and gave birth to children and the children marry each other and so on.
3. yes we're the only alive humans within this universe, but outside the universe are god and his worshippers.
4. our human-shaped bodies are the way we feel, hear, look, and do lots more things!
5. when someone feels unlike normal.
6. to feel there's a side of u that can do the impossible.
7. things were passed down from generations so it's possible that "stuff" can be made back when adam came to earth but other than that there was "stuff" even before humanity.
8. yes
other than that, hope u got ur questions solved
What is the answer to this question in SSS, SAS, AA, or none
Answer:
Step-by-step explanation:
40/32 ?=? (40 + 12.5) / (32 + 10)
1.25 ?=? 52.5 / 42
1.25 = 1.25
similar via SAS
A regular 10-sided polygon has a perimeter of 540 feet. What is
the length of one side?
A.540 feet
B.360 feet
C.270 feet
D.54 feet
Answer:
D. 54 feet
Step-by-step explanation:
One side will be 1/10 of the total length of all 10 sides.
(1/10)(540 ft) = 54 feet . . . length of one side
need help with solving this please
Answer:
3/2
Step-by-step explanation:
Since the shape is an equilateral triangle, all the angles are equal measure, 60° and all the sides are also of equal measure that was given, root3. So half of the triangle has length (root3)/2. The perpendicular drawn in the interior is also an angle bisector. The triangles created are 30°-60°-90° triangles. The sides of this special right triangle are in the ratio
s : 2s : sroot3
The longest side of the 30-60-90 triangle is given. The shortest side is half the length of the longest side. The length of the long leg is the short leg × root3
In this diagram the short leg is (root3)/2 .
(root3)/2 × root3 = 3/2
See image.
My daughter is having a hard time trying to figure this problem.
Hey there! :-)
First, let's find the slope of the line.
We can do that by using this formula:
Slope=Rise/Run
Where
Rise=how many units we move up
Run=how many units we move left or right.
We move 5 units up and 8 units to the right.
Therefore, the slope is 5/8.
The y-intercept (where the line touches the graph) is -9/8.=
Therefore, the equation of the line is y=5/8x-9/8.
Hope this helps you daughter. Use the comment section to clarify any doubts.
Answered by
~A felicitous teen who helps others with a smile on her face
Good luck.
Answer:
a - y=5/8x - 9/8
Step-by-step explanation:
firstly, work out the gradient between those two coordinates
[tex]gradient = \frac{change \: in \: y}{change \: in \: x} [/tex]
[tex]gradient \: = \frac{ - 3 - 2}{ - 3 - 5} = \frac{ - 5}{ - 8} = \frac{5}{8} [/tex]
now, use formula y=mx+c where y is the y coordinate, m is the gradient, x is the x coordinate and c is the y intercept
use any of the two coordinates in the graph. I'll use (5,2)
[tex]y = mx + c[/tex]
[tex]2 = \frac{5}{8} (5) + c[/tex]
[tex]2 = \frac{25}{8} + c[/tex]
[tex]therefore \: c \: is \: - \frac{9}{8} from \: doing \: 2 - \frac{25}{8} [/tex]
now we have the gradient and y intercept
so the equation is
[tex]y = \frac{5}{8} x - \frac{9}{8} [/tex]
In solving the following system of equations, how many equations do you need to multiply in order to use the method of elimination?
Equation 1: −5x−20y=−15 Equation 2: 2x + 8y = 6
A. Two
B. None
C. One
Give the solution to the system above
A. No solution
B. (3, 7)
C. IMS
D. ( -2, 5)
Answer:
a and d i think
Step-by-step explanation:
The probability for event A is 0.3, the probability for event B is 0.6, and the probability of events A or B is 0.8.
Why are the events not mutually exclusive?
A, The sum of P(A) and P(B) is less than P(A or B).
B. The product of P(A) and P(B) is less than P(A or B).
C. The product of P(A) and P(B) is not equal to P(A or B).
D. The sum of P(A) and P(B) is not equal to P(A or B).
The events are not mutually exclusive because D. The sum of P(A) and P(B) is not equal to P(A or B).
Given that
probability for event A, P(A) = 0.3. probability for event B, P(B) = 0.6.the probability of events A or B, P(A or B) = 0.8.For mutually exclusive events, P(A) + P(B) = P(A or B).
So, P(A) + P(B) = 0.3 + 0.6 = 0.9
P(A or B) = 0.8
Since P(A) + P(B) = 0.9 ≠ P(A or B) = 0.8
The events are not mutually exclusive.
So, the events are not mutually exclusive because D. The sum of P(A) and P(B) is not equal to P(A or B).
Learn more about mutually exclusive events here:
https://brainly.com/question/14660720
Answer:
C
Step-by-step explanation:
can someone please help me
Answer:
The mode is 31
good luck naka
Solve each inequality 3+1/2(3-x)<-7
Answer:
You can download app to help you I hope you find your answer
yag cuts 75 degrees angle from a paper circle then he cuts out another section measuring 130 degrees ,what is the angle that is left ?
Answer:
155°
Step-by-step explanation:
We know that the sum of the sections must be 360°. So, by removing a section of 75° he leaves the paper circle with a section of 185°, then removes another 130° section, leaving the last section of 155°.
a) What is the independent variable?
the amount of money Bonnie earns (m)
the number of visitors to Bonnie's site (v)
Answer:
v is independent
Step-by-step explanation:
v because v isn't depended on m
m depends on how many visitors there are so it's depended on v.
:)
If answer is correct I will mark as brainliest.
which of the following expresses the possible number of positive real solutions for the polynomial equation shown below?
5x^3+x^2-7x+28=0
A. Zero
B. Two or Zero
C. One
D. Three or one
Answer:
No positive real solutions.So the answer is zero.
Step-by-step explanation:
The perimeter of a rectangle is 64m and it’s length is 3 times it’s width.what is the length of the rectangle?
so umm this is the answer
Perimeter = 2(length + width)
P = 2(L+w)
We are told the length is 3 times the width...
L = 3w
64 = 2(3w + w)
64 = 2(4w)
64 = 8w
8 = w
L = 3w = 3(8) = 24 cm
Length is 24 cm
width is 8 cm
QUESTION 14 PLEASE HELP ME ASAPP
Answer:
A
Step-by-step explanation:
A. 2 toys/5 minutes
y/x
Step-by-step explanation:
Why use brainly for this
f(x) = 4x, g(x) = x^4 find gog
Answer:
x^16
Step-by-step explanation:
Put x^4 in the place of x, to get (x^4)^4. Multiply the exponents
#7) Identify all pairs of congruent angles
Answer:
A, D, G, H
Step-by-step explanation:
Look at the pink(or purple) lines. R and F both have 4 lines, so they're congruent. S and G both have 1 line, so those are congruent too.
-hope it helps
Answer:
1st option: ∠S ≅ ∠G
4th option: ∠T ≅ ∠H
7th option: ∠Q ≅ ∠E
8th option: ∠R ≅ ∠F
Step-by-step explanation:
Side lengths are unnecessary you just look at those loop things. Angles with the same number of "loops" are congruent like how ∠Q and ∠E both have 3 "loops", this means those angles are congruent.