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
DerKrebs [107]
2 years ago
12

Encontrar la Esperanza Matemática y Desviación Estándar del número de imperfecciones (y) en pizarra acrílica. (2 puntos) y 0 1 2

3 P(y) 1/8 ¼ ½ 1/8
Mathematics
1 answer:
fredd [130]2 years ago
7 0

Responder:

1,625; 0.8569

Explicación paso a paso:

y ___0 ____ 1 ____ 2 ____3

P (y) _1 / 8 ___ ¼ ___ ½ ____ 1/8

Valor esperado (E (x)): Σx * p (x)

= (0 * (1/8)) + (1 * (1/4)) + (2 * (1/2)) + (3 * (1/8)) = 1,625

La desviación estándar = sqrt (Var (x))

Var (X) = Σx²p (x) * E (x) ²

Var (X) = [(0 ^ 2 * (1/8)) + (1 ^ 2 * (1/4)) + (2 ^ 2 * (1/2)) + (3 ^ 2 * (1 / 8))] - 1.625²

Var (X) = (0 * (1/8)) + (1 * (1/4)) + (4 * (1/2)) + (9 * (1/8)) - 1.625 ^ 2

= 3.375 - 2.640625

= 0,734375

Desviación estándar = Sqrt (0,734375) = 0,8569

You might be interested in
La longitud de una varilla es de 12 pulgadas y la de otra varilla es de
gulaghasi [49]

Answer:

Hi how are you doing today Jasmine

6 0
3 years ago
Write the standard form of the equation y+4=12/7(x-1)
Goshia [24]
This is the eqn of a str line.    <span>y+4=12/7(x-1) would be clearer if written as

</span><span>y+4=(12/7)(x-1).     y+4 = (12/7)x - 12/7.  

Multiply all terms by 7 to remove the fractions:  7(y+4) = 12x - 12.

Complete the multiplication:                            7y + 28 = 12x - 12.

Arrange the x and y terms on the left side and the constants on the right:

-12x + 7y = -40.  This is standard form.  Some people might disagree and say that -12x + 7y + 40 is standard form.  They are equivalent.

</span>
5 0
3 years ago
Evaluate : f(x) = x^2 - 2x + 1 , x = 3
den301095 [7]

Answer:

4

Step-by-step explanation:

3^2=9

-2 times 3 = -6

9-6+1=4

8 0
3 years ago
Can someone please help me with 2 and explain the steps to 3 thanks!
Gelneren [198K]

Answer:

#2 is a ratio so you gotta add.

#3 it’s just adding it for example 2p + 5a = 7pa

7 0
3 years ago
Let f and g be the function defined by f(x) =x-10 and g(x) = 4 - x and then value of (f-g) (5) is ??
lions [1.4K]

Answer:

f - g = x - 10 - 4 + x = 2x - 14 \\ f - g(5) =10 - 14 =  - 4

4 0
3 years ago
Other questions:
  • NUMBER 27 please!!!!!!!
    7·1 answer
  •  LOOK BELOW FOR PICTURE The first Pentagon is dilated to form the second pentagon.
    10·2 answers
  • Jack got the expression 7x + 1 and then wrote his answer as 1 + 7x. Is his answer an equivalent expression? How do u know? Expla
    13·2 answers
  • For the following system, use the second equation to make a substitution for x in the first equation.
    8·1 answer
  • How much greater is 6/7 then 5/14
    9·1 answer
  • 7x ^ 3 - 4x ^ 2 - x + 4 is a polynomial. a Write the coefficient of x ^ 2 . What is the degree of the polynomial ?
    8·2 answers
  • Which of the following equations are written in standard form?
    12·1 answer
  • What best describes movement of particles in a solid
    7·2 answers
  • write the equation in slope intercept form for the line that passes through (-2,2) and is parallel to 2x+4y=16
    8·1 answer
  • What is x if <br><img src="https://tex.z-dn.net/?f=xxx%20%2B%203358%20%3D%20461267" id="TexFormula1" title="xxx + 3358 = 461267"
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!