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natima [27]
3 years ago
14

Find the standard deviation for the group of data items. 16, 17, 18, 19, 20

Mathematics
1 answer:
Katarina [22]3 years ago
6 0

Answer:

Hope it helps, please give brainlest!

Step-by-step explanation:

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La edad de Alejandro equivale a las dos quintas partes de la edad de Andrea. Si la suma de
Mariana [72]

Las edades de Andrea y Alejandro son 40 y 16 años, respectivamente.

En esta pregunta debemos traducir el enunciado en ecuaciones algebraicas y resolver el sistema resultante. Tras una lectura cuidadosa tenemos el siguiente sistema de ecuaciones:

y = \frac{2}{5}\cdot x (1)

x + y = 56 (2)

Donde:

  • x - Edad de Andrea, en años.
  • y - Edad de Alejandro, en años.

A continuación, procedemos a resolver el sistema:

(1) en (2):

x + \frac{2}{5}\cdot x = 56

\frac{7}{5}\cdot x = 56

7\cdot x = 280

x = 40

Por (1):

y = \frac{2}{5}\cdot 40

y = 16

Las edades de Andrea y Alejandro son 40 y 16 años, respectivamente.

Para aprender más sobre álgebra, invitamos cordialmente a ver esta pregunta verificada: brainly.com/question/8122776

8 0
3 years ago
I really need help I don’t know how to do this pls
777dan777 [17]

Okay, I attached the image, if you have questions about graphing, go to use desmos

7 0
3 years ago
Which is the range of the function f(x) 1/7(9)x?
SSSSS [86.1K]

Answer:

Range of f(x) = 1/7(9)^x is all real numbers greater than 0.

5 0
3 years ago
Can you work out this math puzzle?
alexandr402 [8]
Triangle=10
Circle=5
Square:3.5
Half square:1.75
Answer to ?:26.25
5 0
3 years ago
Choose the possible descriptions of cross sections formed by the intersection of a plane and a cylinder.
Rus_ich [418]

Answer:

Ellipses (special case is called a circle), hyperbolas, parabolas.

Step-by-step explanation:

These are all conic sections.

A conic section is defined by the cross section of a plane and a double-napped cone. There are other special cases called degenerate conics, which are lines and points (occurs when the equation does not follow the usual pattern, however, these are not considered main conics). The main types of conics are: ellipses, hyperbolas, and parabolas.

The illustration below gives more insight into the question.

I hope this helps.

6 0
3 years ago
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