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2 years ago

What is the sum o 12/13+(-1/13

Mathematics

1 answer:

Vlad [161]2 years ago

7 0

12/13=.923076923 (-.33333333) -.307692305 or -.30

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The two-way table shows the ages of the players on different soccer teams.

sdas [7]

Answer:

Step-by-step explanation:

In the picture attached, the complete question is shown.

The probability that a randomly selected player on Team A is 8 years old is = 4/15

The probability that a randomly selected 8-year-old player is on Team C is = 8/21

The probability that a randomly selected player on Team C is 10 years old is = 5/16

The probability that a randomly selected 10-year-old player is on Team B is = 3/14

6 0

3 years ago

I have an 80 mark math exam this tuesday and there are no study holidays in between. I have 5 chapters coming. I want to practic

IrinaK [193]

Answer:

Study all your notes and re read everything and memorize

Step-by-step explanation:

5 0

2 years ago

F(x)=x^2-3x+15<br> find f(-8)

Vlada [557]

Answer:

103

Step-by-step explanation:

(-8)²-3(-8)+15

64+24+15

103

8 0

1 year ago

A lifeguard is in a look out chair and sees a person in distress. The eye level of the lifeguard is 15 feet above the ground. Th

faltersainse [42]

Answer:

Horizontal distance between lifeguard and the person is 22 feet.

Step-by-step explanation:

Given: A lifeguard sees a person in distress.The eye level of the lifeguard is 15 feet above the ground. Angle of depression is 34°.

To find: Horizontal distance between lifeguard and the person.

Solution : If we draw a triangle then tan∅ = $\frac{height}{base}$

Here base is the horizontal distance.

Now we put the values in the formula.

tan 34° = $\frac{15}{base}$

Or Base = $\frac{15}{tan34}$

= $\frac{15}{0.675} = 22.22 feet$

So the answer is 22 feet.

7 0

2 years ago

2.- Supóngase que los diámetros de los tornillos fabricados por una compañía están distribuidos normalmente con una media de 0.2

Sergio [31]

Answer:

7.30167%

Step-by-step explanation:

Usando la fórmula de puntuación z

z = (x-μ) / σ, donde x es la puntuación bruta, μ es la media de la población y σ es la desviación estándar de la población

Para x <0.20 pulgadas

z = 0.20 - 0.25 / 0.02

z = -2.5

Valor de probabilidad de Z-Table:

P (x <0.20) = 0.0062097

Para x> 0.28 pulgadas

z = 0.28 - 0.20 / 0.02

z = 1.5

Valor de probabilidad de Z-Table:

P (x <0.28) = 0.93319

P (x> 0.28) = 1 - P (x <0.28) = 0.066807

La probabilidad de que se produzcan tornillos defectuosos cuando el tornillo se considera defectuoso si su diámetro es inferior a 0.20 pulgadas o superior a 0.28 pulgadas es

P (x <0.20) + P (x> 0.28)

= 0.0062097 + 0.066807

= 0.0730167

Conversión a porcentaje

= 0.0730167 × 100

= 7.30167%

El porcentaje de tornillos defectuosos producidos es

7.30167%

3 0

2 years ago