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Nadya [2.5K]
3 years ago
11

Expand the polynomials and simplify. (2x+3y)^2

Mathematics
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

4x^2+12xy+9y^2

Step-by-step explanation:

brainliest

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ch4aika [34]

Answer:

43.25-7-(t*1.15)

Step-by-step explanation:

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3 years ago
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There were 324 adults surveyed. Among the participants, the mean number of hours of sleep each night was 7. 5 and the standard d
NeTakaya

The margin of error for 324 adults surveyed with 1.6 standard deviations is 0.1742.

<h3>What is the margin of error?</h3>

The margin of error can be defined as the amount of random sampling error in the results of a survey. It is given by the formula,

\text{MOE}_{\gamma}=z_{\gamma} \times \sqrt{\frac{\sigma^{2}}{n}}

\text{MOE} = margin of error

\gamma = confidence level

z_{\gamma} = quantile

σ = standard deviation

n = sample size

As it is given that the sample size of the survey is 324, while the standard deviation of the survey is 1.6.

We know that the value of the z for 95% confidence interval is 1.96. Therefore, using the formula of the standard of error we can write it as,

\text{MOE}_{\gamma}=z_{\gamma} \times \sqrt{\dfrac{\sigma^{2}}{n}}\\\\\text{MOE}_{\gamma}=1.96 \times \sqrt{\dfrac{1.6^{2}}{324}}\\\\\text{MOE}_{\gamma}=0.1742

Hence, the margin of error for 324 adults surveyed with 1.6 standard deviations is 0.1742.

Learn more about Margin of Error:

brainly.com/question/6979326

5 0
2 years ago
A car travel 120miles in 3hours how far will it take to travel 200miles
Alekssandra [29.7K]

Answer:

Step-by-step explanation:

120/3= is 40mph

200/40= 5

At 40 mph it will take 5 hours.

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2 years ago
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What the prime factorization on 75?<br><br>​
nikklg [1K]

Answer:

3*5^2

Step-by-step explanation:

75 is divisible by 3

75/3 = 25

25 is not divisible by 3, but it is divisible by 5.

25 = 5^2.

25/25 = 1. We are done.

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3 years ago
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Answer:

what the question

Step-by-step explanation:

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