1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ivanshal [37]
3 years ago
11

I am not sure help out

Mathematics
1 answer:
steposvetlana [31]3 years ago
7 0
For one I hate endenuity, and two the answer is 
B
idk im dumb 
You might be interested in
chegg Y=4X−2 XX has a PDF of f_X(x)=\begin{cases} 3e^{-3x} & 0 \leq x \\ 0 & \text{otherwise}\end{cases}f X ​ (x)={ 3e −
Licemer1 [7]

\Bbb E[Y^2] = \Bbb E[(4X - 2)^2]

so by definition of expectation,

\Bbb E[Y^2] = \displaystyle \int_{-\infty}^\infty (4x-2)^2 f_X(x) \, dx = \int_0^\infty 3(4x-2)^2 e^{-3x} \, dx

Integrate by parts (twice).

\displaystyle \int_a^b u\,dv = uv\bigg|_a^b - \int_a^b v\,du

First, let

u = (4x-2)^2 \implies du = 8(4x-2)\,dx \\\\ dv = 3e^{-3x} \, dx \implies v = -e^{-3x}

so that

\displaystyle \Bbb E[Y^2] = -(4x-2)^2 e^{-3x} \bigg|_{x=0}^{x\to\infty} + 8 \int_0^\infty (4x-2) e^{-3x} \, dx \\\\ ~~~~ = 4 + 8 \int_0^\infty (4x-2) e^{-3x} \, dx

Next,

u = 4x-2 \implies du = 4\,dx \\\\ dv = e^{-3x} \, dx \implies v = -\dfrac13 e^{-3x}

so that

\displaystyle \Bbb E[Y^2] = 4 + 8 \left(-\frac13 (4x-2) e^{-3x} \bigg|_{x=0}^{x\to\infty} + \frac43 \int_0^\infty e^{-3x} \, dx\right) \\\\ ~~~~ = 4 + 8 \left(-\frac23 - \frac49 e^{-3x}\bigg|_{x=0}^{x\to\infty}\right) \\\\ ~~~~ = 4 - \frac{16}3 + \frac{32}9 = \boxed{\frac{20}9}

7 0
1 year ago
Help me with this!!
Neporo4naja [7]

Answer:

Step-by-step explanation:

so we see the two line of the same length of 14, which tells us that the lengths of 5x  and 7x-8  have to be the same length.  so we know we can set them equal to each other.  Often times that's the key to math problems , finding where you can set things equal.

5x = 7x-8  ( subtract 5x from both sides and then add 8 to both sides )

8 = 2x ( divide both sides by 2 )

4 = x

nice this looks right too  , both sides add to 20  :)

5 0
2 years ago
For the following equation, what would you do first? -8n+4(1-5n)=-6n-14
Mkey [24]

Answer:

1-5n

Step-by-step explanation:

you would do 1-5n because its in brackets, the order of opperation is

Brakcets

Order (Power ofs)

Division and Mulitplication

then do addition and subtraction

when doing division and multiplication and subtraction and addition go left to right to find what part goes 1st.

Hope this helped!

4 0
3 years ago
Which expression is equivalent to 4x-9+6y+17x
Alexxx [7]

21x-9+6y

combining terms:  4x+17x=21x



6 0
3 years ago
Read 2 more answers
28.) Find the slope of the line that passes through the pair of points.
DerKrebs [107]

Answer:

the d is right one look this img

4 0
3 years ago
Other questions:
  • Which number line shows the graph of -0.7
    6·2 answers
  • Factorize x^3+4x^2+x-6
    15·1 answer
  • 7. Jenny wants to buy some shoes. She found the shoes at the store for a 10 points
    13·1 answer
  • What's the solution of -2+2/5
    5·1 answer
  • Please help I will thank you and mark you brain list if you do this word problem correct
    10·1 answer
  • Ming has a goal to jog 4 1/2 miles each day .on monday she jogged 5 9/16 miles.by how much did she exceed her goal for that day
    6·1 answer
  • What is the value of cos 0 given that (-2, -3) is a point on the terminal side of 0?
    10·1 answer
  • A soccer field is a rectangle 40 yards long and 30 yard wide. The coach asks the players to run from one corner to the other cor
    8·1 answer
  • Which one is it??????
    6·2 answers
  • PLS HELP EASY ALGEBRA LOTS OF POINTSSS AND BRAINLIEST
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!