3 years ago

Help plsssd Help pldddd

Mathematics

1 answer:

alexgriva [62]3 years ago

8 0

ok the first one

and this is the second one

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What is the area of the triangle?

Natalka [10]

Answer:

22.5 square units

Step-by-step explanation:

In the picture below it shows a full rectangle square unit of the right triangle.

The Full rectangle is 45 square units

Hence, if we cut the full rectangle in half it equal the right triangle.

Therefore, 45/2 = 22.5

8 0

2 years ago

Factors of 21 and 12 have in common with the greatest

Salsk061 [2.6K]

The GCF of 21 and 12 is 3. Hope this helps! :)

<h2>-CloutAnswers</h2>

4 0

3 years ago

The perimeter of and equilateral triangle is 60mm. What is the size of the other side?

Alex

Answer:

20mm

Since it a equilateral triangle we know that there is 3 sides and all of them are euqal. Therefore, 60/3 =20 meaning each side is 20mm.

8 0

3 years ago

A simple random sample of size n is drawn from a normally distributed population, and the mean of the sample is (x with a line o

prohojiy [21]

Answer:

Last option

${\overline {x}}} \± \frac{2.58*s}{\sqrt{n}$

Step-by-step explanation:

${\overline {x}}$

If we extract a sample of size n from a normal population and we want to estimate the population mean then the confidence interval for the mean will be:

${\overline {x}}} \± Z_{\alpha/ 2}*\frac{s}{\sqrt{n}$

Where

Where ${\overline {x}}$ is an estimator for the mean μ.

n is the sample size and s is its standard deviation.

$\alpha$ is the level of significance

$\alpha$ = 1-Confidence Level

$\alpha= 1-0.99$

$\alpha = 0.01$

Then $Z_{\frac{\alpha}{2}} = Z_{\frac{0.01}{2}} = Z_{0.005}=2.58$

Then the 99% confidence interval for the population mean is

${\overline {x}}} \± \frac{2.58*s}{\sqrt{n}$

3 0

3 years ago

Read 2 more answers

U.S. soybeans average 39% protein. A bushel of soybeans weighs 60 lbs. How many pounds of protein are in a bushel? A 120-acre fi

Salsk061 [2.6K]

Answer:

Step-by-step explanation:

7 0

3 years ago