(3x4) divide by (7+9-10)

Mathematics

2 answers:

maria [59]3 years ago

8 0

Answer:

Step-by-step explanation:

3x4 is 12. 7+9-10 is 6. 12/6 is 2.

Rus_ich [418]3 years ago

4 0

$\text{Hey there!}$

$\mathsf{Your\ equation:\ }\mathsf{\cfrac{3\times4}{7+9-10}}$

$\mathsf{\dfrac{3\times4}{7+9-10}}\\\\\\\mathsf{3\times4=12}\\\\\\\mathsf{\dfrac{12}{7+9-10}}\\\\\\\mathsf{7+9=16}\\\\\\\mathsf{\dfrac{12}{16-10}}\\\\\\\mathsf{16-10=6}\\\\\mathsf{\dfrac{12}{6}}$

$\mathsf{\dfrac{12\div6\leftarrow numerator}{6\div6\leftarrow denominator}}\\\\\\\mathsf{12\div6=2}\\\\\\\mathsf{6\div6=1}\\\\\\\mathsf{\dfrac{2}{1}=2}\\\\\\\\\boxed{\boxed{\mathsf{Answer:2}}}\checkmark$

$\text{Good luck on your assignment and enjoy your day!}$

~ $\frak{LoveYourselfFirst:)}$

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Please help! I don't understand how to solve this problem

Ilia_Sergeevich [38]

Using the z-distribution, a sample of 142,282 should be taken, which is not practical as it is too large of a sample.

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

The confidence interval is:

$\overline{x} \pm z\frac{\sigma}{\sqrt{n}}$

The margin of error is:

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

In which:

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

z is the critical value.

n is the sample size.

$\sigma$ is the standard deviation for the population.

Assuming an uniform distribution, the standard deviation is given by:

$S = \sqrt{\frac{(4 - 0)^2}{12}} = 1.1547$

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.