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3 years ago

34k+(6.3−8.1k)÷0.9=22

Mathematics

1 answer:

KATRIN_1 [288]3 years ago

8 0

We have been given an equation $34k+(6.3-8.1k)\div 0.9=22$ . We are supposed to solve our given equation for k.

We can rewrite our given equation as:

$34k+\frac{6.3-8.1k}{0.9}=22$

Let us multiply both sides of equation by 0.9.

$34k\cdot 0.9+\frac{6.3-8.1k}{0.9}\cdot 0.9=22\cdot 0.9$

$30.6k+6.3-8.1k=19.8$

$22.5k+6.3=19.8$

$22.5k+6.3-6.3=19.8-6.3$

$22.5k=13.5$

$\frac{22.5k}{22.5}=\frac{13.5}{22.5}$

$k=0.6$

Therefore, the value of the k is 0.6.

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Step-by-step explanation:

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Directions: Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).. Th

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Find out the The numerical value of A - B and the numerical value of B - A .

To prove

As given

The expression 113.47 - (43.72 - 26.9) represents A.

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Thus

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First solving the bracket terms.

A - B = 113.47 - (43.72 - 26.9) - 113.47 + (26.9 - 43.72)

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Therefore the value of A- B is -33.64 .

Thus

B - A = 113.47 - (26.9 - 43.72) - (113.47 - (43.72 - 26.9))

First solving the bracket terms.

B - A = 113.47 - (26.9 - 43.72) - 113.47 + (43.72 - 26.9)

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Read 2 more answers

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3 years ago

Los alumnos de 6 grado obtuvieron las siguientes calificaciones en sus exámenes de matemáticas, encuentra la Media, moda y media

skelet666 [1.2K]

Answer:

Media = 8.73

Moda = 9.0

Mediana = 9.0

Step-by-step explanation:

En este caso, vamos a repasar primero el concepto de cada uno:

Media: Se refiere a un promedio numérico de varios datos en una medida. Se calcula como la sumatoria de todos los valores numéricos dividido entre la cantidad de valores existentes,

Moda: Se refiere al valor numérico que mas se repite en una secuencia numérica.

Mediana: Se refiere al número, o números, que se encuentran justo en la mitad de una secuencia numérica ordenada de menor a mayor o de mayor a menor.

Tomando en cuenta estos conceptos, determinemos cada uno de ellos. Son 15 calificaciones. Si las ordenamos todas de menor a mayor tenemos:

7.0, 8.0, 8.0, 8.0, 8.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 10.0, 10.0

Para la media:

Media = 7 + (8+8+8+8) + (9+9+9+9+9+9+9+9) + (10+10) / 15

<h2>Media = 8.73</h2>

<u>Para la moda:</u>

Como se puede observar, la calificación 9.0 se repitió 8 veces por lo tanto

<u>Para la mediana:</u>

Al observar los datos ordenados de mayor a menor, nos damos cuenta que la calificación 9.0 se encuentra en la mitad de esos datos, asi que

<h2>Mediana = 9.0</h2>

Espero te ayude.

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