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IrinaK [193]
4 years ago
11

The diameter of a circle is 7 cm. Find its circumference in terms of \piπ.

Mathematics
1 answer:
ycow [4]4 years ago
8 0

Answer: 7π

Step-by-step explanation:

7 * n    since it says in terms of pie, you do not have to multiply just leave pie alone.

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Which best describes how to solve the equation for x.
prohojiy [21]

Answer:

B. multiply both sides by c.

Step-by-step explanation:

To solve the equation for x, you have to isolate the x variable on one side of the equation. To do this, do the opposite of any operation applied to x to remove other variables from the x's side of the equation:

x/c = d

multiply both sides of the equation by c to isolate x:

(x/c) * c = d * c

x = dc

Now x can be solved for.

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If it takes you 72 seconds to walk upstairs from the first floor to the fourth floor,how long does it take you to walk from the
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576

Step-by-step explanation:

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4 years ago
a garden hose can 1/3 of a pool in 3/4 hour. How much of the pool can the garden hose fill in an hour?
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Step-by-step explanation:

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3 years ago
El administrador de una cafetería sabe que vende diariamente 50 litros de jugo mixto. Para elaborar este jugo se emplean dos pre
Nina [5.8K]

Answer:

Se necesitan 37.5 litros del preparado que contiene 5% de jugo natural, y 12.5 litros del que contiene 25%.

Step-by-step explanation:

Primero calculamos la cantidad total de jugo natural que se necesita, a partir del volumen de jugo mixto que se quiere vender:

  • 50 L * 10/100 = 5 L

Ahora, que X sean los litros del preparado con jugo de 5%, y que Y sean los litros del preparado con jugo de 25%:

La suma de ambos preparados tiene que ser 50 L:

1.    x + y = 50

La suma del jugo natural tiene que ser 5:

2.   x*5/100 + y*25/100 = 5

Por lo que tenemos <em>un sistema de dos ecuaciones y dos incognitas</em>.

Expresamos x en términos de y:

  • x + y = 50
  • x = 50 - y

Reemplazamos x en la segunda ecuación:

  • (50-y)*5/100 + y*25/100 = 5

Y despejamos <em>y</em>:

  • 2.5 - 0.05y + 0.25y = 5
  • 0.20y = 2.5
  • y = 12.5

Usando ese valor de y, calculamos x:

  • x + 12.5 = 50
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7 0
3 years ago
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Evgesh-ka [11]

Answer: 10

Step-by-step explanation: The diameter is twice the radius

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2 years ago
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