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garik1379 [7]
3 years ago
5

Mi hermano jueja al tenis ____________ (every now and then).

Mathematics
2 answers:
lesya [120]3 years ago
7 0

Answer:

B. de vez en cuando.

Step-by-step explanation:

dem82 [27]3 years ago
3 0

Answer:

B. de vez en cuando

Step-by-step explanation:

the literal transalation for "every now and then" in spanish is de vez en cuando.  Plus im am a native spanish speaker ;)

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In the past, 21% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An independent research firm ha
Afina-wow [57]

Answer:

A sample size of 79 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

\pi = 0.21

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.  

What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.09?

A sample size of n is needed.

n is found when M = 0.09. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.09 = 1.96\sqrt{\frac{0.21*0.79}{n}}

0.09\sqrt{n} = 1.96\sqrt{0.21*0.79}

\sqrt{n} = \frac{1.96\sqrt{0.21*0.79}}{0.09}

(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.21*0.79}}{0.09})^{2}

n = 78.68

Rounding up to the nearest whole number.

A sample size of 79 is needed.

4 0
3 years ago
The height of Liliana’s picture frame is 18 inches. The frame and blue matting take up 4.5 inches of the height. Liliana wants t
Genrish500 [490]

.Answer: C

Step-by-step explanation:

4.5+p would be the full length of 18 since it is sharing the total length.

8 0
3 years ago
Select all expressions that are equivalent to 4x+2(2x-5)-(3-5x)
Arada [10]

For this case we have the following expression:

4x + 2 (2x-5) - (3-5x)

Applying distributive property to the terms within parentheses taking into account that:

- * + = -\\- * - = +

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4x + 4x-10-3 + 5x =

We add similar terms taking into account that:

Equal signs are added and the same sign is placed.

4x + 4x + 5x-10-3 =\\13x-13

Thus, an equivalent expression is:

13x-13

Answer:

13x-13

4 0
3 years ago
Which best models a plan a. floor b. pebble c. jump rope d. stick
Setler79 [48]
Its .A.

hope this helps
3 0
3 years ago
What is the slope of the line?
KIM [24]

Answer:

Slope = -\frac{1}{3}

Step-by-step explanation:

6 0
3 years ago
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