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valina [46]
3 years ago
8

Translate into an Variable expression: A number added to the difference between twice the number and 4

Mathematics
1 answer:
Citrus2011 [14]3 years ago
7 0
2+2x-4 I'm pretty sure that this is the answer..
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Identify the percent of change as increase or decrease of 138 to 75
RUDIKE [14]
138 x ? = 75
? = 75/138 = 0.544(3sf)
so about 54.35% (2dp) decrease
8 0
2 years ago
PLSSSSS HURRY Brainliset involed
ExtremeBDS [4]

Answer:

24.36m²

Step-by-step explanation:

area = ½×(8.9+2.7)×4.2= ½×48.72=24.36m²

4 0
3 years ago
solo el 20% de los empleados de la población civil que está en una base militar restringida porta su identificación personal. Si
prisoha [69]

Usando la distribución binomial, hay una probabilidad de 0.8926 = 89.26% de que el guardia de seguridad encuentre al menos uno en la base militar restringida.

<h3>¿Qué es la distribución binomial?</h3>

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

C_{n,x} = \frac{n!}{x!(n-x)!}

Los parámetros son:

  • n es el número de ensayos.
  • p es la probabilidad de éxito en un ensayo
  • x es el número de éxitos

En este problema, hay que:

  • 20% de los empleados de la población civil que está en una base militar restringida porta su identificación personal, o sea p = 0.2.
  • Llegan 10 empleados, o sea, n = 10.

La probabilidad de que el guardia de seguridad encuentre al menos uno en la base militar restringida es dada por:

P(X \geq 1) = 1 - P(X = 0)

En que:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{10,0}.(0.2)^{0}.(0.8)^{10} = 0.1074

Por eso:

P(X \geq 1) = 1 - P(X = 0) = 1 - 0.1074 = 0.8926

Hay una probabilidad de 0.8926 = 89.26% de que el guardia de seguridad encuentre al menos uno en la base militar restringida.

Puede-se aprender más a cerca de la distribución binomial en brainly.com/question/25132113

3 0
2 years ago
You have found the following ages (in years) of all 4 zebras at your local zoo: 14, 15, 9, 1 What is the average age of the zebr
joja [24]

Answer:

9.75 Average age

Step-by-step explanation:

3 0
3 years ago
Evelyn is taking a multiple choice test with a total of 20 points available. Each
solniwko [45]

Answer:17 out of 20

Step-by-step explanation:

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3 years ago
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