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3 years ago

Two reasons why electronic media has become more accessible for communities

1 answer:

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Electronic media produces new changes in the societies by giving different ideas in different programs. Electronic media spreads new ideas about standard of living, fashion, education and in the way of thinking by which people are greatly impressed and try to adopt them in their lives.

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How would you choose to reduce the system shown to a 2 × 2? Explain why you would choose this approach. –3x y – 2z = 10 (1) 5x –

Norma-Jean [14]

Answer:

Eliminate y by adding equations (1) and (3) because the coefficients on y are opposites. Then eliminate y by multiplying equation (1) by 2 and adding it to equation (2). Eliminate z by subtracting equations (1) and (2) because the coefficients are the same. Then eliminate z by multiplying equation (3) by 2 and adding it to equation (1).

Explanation:

6 0

3 years ago

All the actresses brought (her, their) scripts

Vikentia [17]

Answer:

their

Explanation:

Lets highlight the keywords in this sentence.

All the actresses brought (her, their) scripts.

The words all and actresses are telling you that there are more than 1 actress, so we will refer to them as 'their'.

4 0

2 years ago

Read 2 more answers

Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll

Andrew [12]

Using the t-distribution, as we have the standard deviation for the sample, it is found that the 95% confidence interval for the number of units students in their college are enrolled in is (11.7, 12.7).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm t\frac{s}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

t is the critical value.

n is the sample size.

s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed <em>95% confidence interval</em>, with 49 - 1 = <em>48 df</em>, is t = 2.0106.

Hence:

$\overline{x} - t\frac{s}{\sqrt{n}} = 12.2 - 2.0106\frac{1.6}{\sqrt{49}} = 11.7$

$\overline{x} + t\frac{s}{\sqrt{n}} = 12.2 + 2.0106\frac{1.6}{\sqrt{49}} = 12.7$

The 95% confidence interval for the number of units students in their college are enrolled in is (11.7, 12.7).

More can be learned about the t-distribution at brainly.com/question/16162795

4 0

3 years ago

How do I write an essay, that really gets to the point?

djverab [1.8K]

Answer:

I took the SAT and ACT a couple of times and the things I have found the most important on the essay portion is organization, planning, structure, support/evidence, and clarity. I personally recommend planning out the structure of your essay and all of the main points in order before writing to make sure that your essentials are right in front of you. Honestly, do not be afraid to take some time and plan, I think that is where my writing suffered the most. The people reviewing your written section will also want you to have a lot of direct quotes, evidence from the text, and strong points to backup your main argument. Be confident with your answer and have a strong beginning and ending.

Hopefully this helps a bit, sorry if it does not!

8 0

4 years ago

What is the solubility of mg(oh)₂ at a ph of 12.70? (ksp mg(oh)₂ is 1.6 × 10⁻¹³)

Feliz [49]

Based on the calculations, the solubility of mg(oh)₂ at a pH of 12.70 is equal to 3.4 × 10⁻⁵ M.

<u>Given the following data:</u>

Ksp of mg(oh)₂ = 1.6 × 10⁻¹³

pH = 12.70

pH is an abbreviation for the power of hydrogen ions and it can be defined as a measure of the molar concentration of hydrogen ions that are present in a given solution. Thus, the power of hydrogen ions (pH) is generally used to identify or specify the acidity, neutrality, or basicity of any chemical solution.

First of al, we would write the properly balanced chemical equation for this chemical reaction:

$Mg(OH)_2(s)\rightleftharpoons Mg^{2+} (aq)+ 2OH^{-}(aq)$

Mathematically, the Ksp for the above chemical reaction is given by:

Ksp = [Mg²⁺][OH⁻]²

Ksp = [x][2x]²

1.6 × 10⁻¹³ = 4x³

x = ∛4 × 10⁻¹⁴

x = 3.4 × 10⁻⁵ M.

Read more on solubility here: brainly.com/question/3006391

3 0

2 years ago