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
Alex
3 years ago
8

How do i solve -4(9-7x)-(1-x)=4(x-6)

Mathematics
1 answer:
olga2289 [7]3 years ago
6 0

Answer:

x = 13/25

Step-by-step explanation:

- 4 (9 - 7x) - (1 - x) = 4 (x - 6)

- 36 + 28x - 1 + x = 4x - 24

28x + x - 4x = - 24 + 36 + 1

25x = 13

x = 13/25

You might be interested in
Why does the fraction 20/25 not belong with 1/20, 2/3 and 5/4?
devlian [24]
I’m not 100% sure but I think it’s because 20/25 can still be simplified further, while the other 3 can’t.
7 0
3 years ago
How many decameters are there in 14 meters
kramer
In 1 meter is 10 decameters. In 14 meters=140 decameters
7 0
3 years ago
Can anyone tell me what’s the simplest form of the radical expression?
Tresset [83]
-1
I think I got this wrong I'm sorry if I couldn't help
7 0
3 years ago
Find one factor of 3x^3-10x^2+3x+10
vfiekz [6]
Factor 3x^3-10x^2+3x+10
=(x-2)(3x^2-4x-5)
8 0
3 years ago
The random variable X has the following probability density function: fX(x) = ( xe−x , if x > 0 0, otherwise. (a) Find the mo
dusya [7]

Answer:

Follows are the solution to the given points:

Step-by-step explanation:

Given value:

\to f_X (x) \ \ xe^{-x} \ , \ x>0

For point a:

Moment generating function of X=?

Using formula:

\to M(t) =E(e^{tx})= \int^{\infty}_{-\infty} \ e^{tx} f(x) \ dx

M(t) = \int^{\infty}_{-\infty} \ e^{tx}xe^{-x} \ dx = \int^{\infty}_{0} \ xe^{(t-1)x} \ dx

integrating the values by parts:

u = x \\\\dv = e^{(t-1)x}\\\\dx =dx \\\\v= \frac{e^{(t-1)x}}{t-1}\\\\M(t) =[\frac{e^{(t-1)x}}{t-1}]^{-\infty}_{0}  -\int^{\infty}_{0} \frac{e^{(t-1)x}}{t-1} \ dx\\\\  

        = \frac{1}{t-1} (0) - [\frac{e^{(t-1)x}}{(t-1)^2}]^{\infty}_{0}\\\\=\frac{1}{(t-1)^2}(0-1)\\\\=\frac{1}{(t-1)^2}\\\\

Therefore, the moment value generating by the function is =\frac{1}{(t-1)^2}

In point b:

E(X^n)=?

Using formula: E(X^n)= M^{n}_{X}(0)

form point (a):

\to M_{X}(t)=\frac{1}{(t-1)^2}

Differentiating the value with respect of t

M'_{X}(t)=\frac{-2}{(t-1)^3}

when t=0

M'_{X}(0)=\frac{-2}{(0-1)^3}= \frac{-2}{(-1)^3}= \frac{-2}{-1}=2\\\\M''_{X}(t)=\frac{(-2)(-3)}{(t-1)^4}\\\\M''_{X}(0)=\frac{(-2)(-3)}{(0-1)^4}= \frac{6}{(-1)^4}= \frac{6}{1}=6\\\\M''_{X}(t)=\frac{(-2)(-3)}{(t-1)^4}\\\\M''_{X}(0)=\frac{(-2)(-3)}{(0-1)^4}= \frac{6}{(-1)^4}= \frac{6}{1}=6\\\\M'''_{X}(t)=\frac{(-2)(-3)(-4)}{(t-1)^5}\\\\M''_{X}(0)=\frac{(-2)(-3)(-4)}{(0-1)^5}= \frac{24}{(-1)^5}= \frac{24}{-1}=-24\\\\\therefore \\\\M^{K}_{X} (t)=\frac{(-2)(-3)(-4).....(k+1)}{(t-1)^{k+2}}\\\\

M^{K}_{X} (0)=\frac{(-2)(-3)(-4).....(k+1)}{(-1)^{k+2}}\\\\\therefore\\\\E(X^n) = \frac{(-2)(-3)(-4).....(n+1)}{(-1)^{n+2}}\\\\

7 0
2 years ago
Other questions:
  • How can you translate the word phrase into verbal expression eight less than the quotient of x and three
    7·1 answer
  • The corresponding sides of two similar triangles are (A.CONGRUENT .
    11·2 answers
  • How does 2π/4 simplify to π/4?
    15·1 answer
  • Please help and thank you
    6·2 answers
  • Differentiate x^2 e^x logx
    10·1 answer
  • A woman starts out walking due north for 2 miles, and then she turns due west and continues for another 2 miles. How far from he
    7·1 answer
  • A survey of 100 people found that 35 people exercise in the morning, 45 people exercise in the afternoon, and 20 people exercise
    7·2 answers
  • Please help!!!
    13·1 answer
  • -8x+3(x-5)=25 solve for x<br><br> literally i will give u points or whatever just get me an answer
    12·2 answers
  • The year 2004 has the units digit equal to twice the thousands digit. How many years will it be before this next happens?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!