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]
3 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]3 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
What is an example of a one step equation that would use multiplication
poizon [28]

Answer:

Multiplication equation 6 t = 54 6t = 54 6t=54 Multiply each side by five.

7 0
3 years ago
What is 44.84 times 9.84 =<br> what is 88.6 times5.01
slega [8]
44.85 * 9.84 = 441.2256

88.6 * 5.01 = 443.886
6 0
3 years ago
Help please!!!!! I’m using Plato
pshichka [43]

Answer:

\frac{y^{6}  }{ x^{2} }

Step-by-step explanation:

y^{6} x^{-2}

6 0
3 years ago
Read 2 more answers
A total of 133 million square miles of the Earth's surface are covered in water. The ratio of the area covered in water to the a
Anni [7]

Answer:

  • 57 million square miles

Step-by-step explanation:

Let the area of water is w and area of land is l.

<u>Their ratio is:</u>

  • w/l = 7/3

or

  • 133 / l = 7/3

Find the value of l

  • l = 133*3/7
  • l = 57 million square miles
6 0
2 years ago
4. Add one set of parentheses to make the expression equal
Sauron [17]

The expression that is equal to 2022 by adding a set of parentheses is 12 x 12 x 12+ 12 x 12+ 12 x 12 + 12 / (12 /12 + 12 / 12).

<h3>How to solve a long-expression problem?</h3>

In mathematics, parentheses are used to group a set of mathematical terms. In  a long-expression, like the one presented, using parenthesis implies:

  • The terms in the parentheses are solved separately from those outside the parentheses.
  • The terms in the parentheses are solved before solving those outside.
  • Moving the parentheses will affect the result of the whole expression.

Based on this, the expression that equals 2022 is:

  • 12 x 12 x 12+ 12 x 12+ 12 x 12 + 12 / (12 /12 + 12 / 12)

<h3>Let's solve it to prove this result</h3><h3 />
  • 12 x 12 x 12+ 12 x 12+ 12 x 12 + 12 / (12 /12 + 12 / 12)

First, solve the parenthesis first by dividing and then by adding.

  • 12 x 12 x 12+ 12 x 12+ 12 x 12 + 12 / (1 + 1)12 x 12 x 12+ 12 x 12+ 12 x 12 + 12 / 2

Now, let's solve this expression, the first step is to solve the multiplications.

  • 1728 + 144 + 144 + 12/2

Now, solve the division.

  • 1728 + 144 + 144 + 6

Finally, add everything.

  • 1728 + 144 + 144 + 6 = 2022

Learn more about mathematics in: brainly.com/question/12083755

7 0
2 years ago
Other questions:
  • HELP please !!!!! PLZ
    8·1 answer
  • Amantha wants to use her savings of $1140 to buy shoes and scarves. The total price of the scarves she bought was $80. Each pair
    10·2 answers
  • How do you do this to get one pls I need help
    12·1 answer
  • What is m=1/2, b=-8 as an equation
    13·2 answers
  • A medical company tested a new drug on 100 people for possible side
    7·1 answer
  • I need help with thissss!
    12·1 answer
  • Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. Use the drop-down menus to identify the steps Lorne used to find the dif
    15·1 answer
  • F(x)=3x-7 input is 3
    13·1 answer
  • Help please <br>I DONT understand <br>​
    11·2 answers
  • Combine the like terms to create an equivalent expression. (6e−3f−4)⋅2
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!