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4 years ago

What is the answer x/5+7=16

Mathematics

1 answer:

vfiekz [6]4 years ago

5 0

Answer:

Step-by-step explanation:

x/5+7=16

times 5 both sides

x + 7 = 80

-7 -7

x=73

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3 years ago

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3 years ago

Two containers hold several balls. Once a second, one of the balls is chosen at random and switched to the other container. Afte

natka813 [3]

Answer:

(a) 8 balls

(b) 4 balls

Step-by-step explanation:

Let

$N \to$ Number of balls

For a box, the probability that there are N balls in it is:

$Pr = 0.5^N$

For 2 boxes, it is:

$Pr = 2 * 0.5^N$

From the question, we have:

$\frac{80}{10000} \to$ Favorable outcome

To solve for N, we have:

$2 * 0.5^N = \frac{80}{10000}$

$2 * 0.5^N = 0.008$

Divide both sides by 2

$0.5^N = 0.004$

Take log of both sides

$\log(0.5^N) = \log(0.004)$

Apply law of logarithm

$N\log(0.5) = \log(0.004)$

Make N the subject

$N = \frac{\log(0.004)}{\log(0.5)}$

$N =7.966$

Approximate

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Here, we assume that each ball will have almost the same number of balls at a given instance;

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$Balls \approx \frac{N}{2}$

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3 years ago

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3 years ago

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olganol [36]

Answer:

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Step-by-step explanation:

2/21+6/7

=2/21+(6*3/7*3)

=2/21+18/21

=20/21

Hope this helps! Comment any questions <3

4 0

2 years ago

Read 2 more answers