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Oxana [17]
3 years ago
14

En una prueba de natación, Mario hizo el recorrido en ¾ de minuto y David en 4/5 de minuto ¿Cuál es la diferencia entre los dos

competidores? Marca la operación correcta que se debe hacer: *
Mathematics
1 answer:
slamgirl [31]3 years ago
6 0

Answer:

3 segundos

Step-by-step explanation:

De la pregunta anterior, se nos dice que:

En un evento de natación, Mario hizo el curso en ¾ de minuto

1 minuto = 60 segundos

Por lo tanto = 3/4 de minuto

= 3/4 × 60 segundos

= 45 segundos

David completó el curso en 4/5 de un minuto.

1 minuto = 60 segundos

Por lo tanto = 4/5 de un minuto

= 4/5 × 60 segundos

= 48 segundos

La diferencia entre los dos competidores se calcula como

48 segundos - 45 segundos

= 3 segundos.

Por lo tanto, la diferencia entre los dos competidores = 3 segundos.

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Which of the following does NOT represent a function ?
Veseljchak [2.6K]

Answer:. C is not a function.

Step-by-step explanation: If there is more than one y-value for each x-value, it can't be a function. The elipse has two y-values for each x.

8 0
3 years ago
1. (SLO) Simplify the expression: 6(b-7)
Sav [38]

1 → B

multiply each term in the parenthesis by the 6 outside

6(b-7) = 6b - 42

2 → D

multiply each term in the parenthesis by the 3 outside

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3 → A

the value outside the parenthesis is -1, hence each term inside is multiplied by -1

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3 0
3 years ago
Read 2 more answers
You are planning a survey of starting salaries for recent computer science majors. In a recent survey by the National Associatio
nydimaria [60]

Answer:

A sample size of 554 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Standard deviation is known to be $12,000

This means that \sigma = 12000

What sample size do you need to have a margin of error equal to $1000, with 95% confidence?

This is n for which M = 1000. So

M = z\frac{\sigma}{\sqrt{n}}

1000 = 1.96\frac{12000}{\sqrt{n}}

1000\sqrt{n} = 1.96*12

Dividing both sides by 1000:

\sqrt{n} = 1.96*12

(\sqrt{n})^2 = (1.96*12)^2

n = 553.2

Rounding up:

A sample size of 554 is needed.

5 0
2 years ago
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padilas [110]
Answer:
The slope or m is 2

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The full answer is y = 2x + 4/3

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And the slope is m
3 0
3 years ago
[(2x 10) divided by 1/3]+8
mel-nik [20]

Answer: 14.7 (Rounded)

Work: So since (2 x 10) / 1/3 is in parentheses, I'm going to to that first. And since (2 x 10) is in parentheses in a parentheses, I'm going to do that multiplication first. After doing the multiplication, I get 20, and I'm going to divide it by 1/3 since it's in the parentheses. After dividing, I get 6.666..., But I'm going to round it to 6.7. Then, I'm going to add 6.7 by 8, and I got 14.7

<em>I hope this helps, and Happy Holidays! :)</em>

3 0
3 years ago
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