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3 years ago

12

If two angles of a triangle each measure 45 degrees what is the third angle

1 answer:

Dennis_Churaev [7]3 years ago

6 0

Since you have two angles that measure 45 degrees. Those 2 equal 90 degrees altogether. Since a triangle measures 180 degrees, you take 180-90 because you already have 2 angles and are trying to find the last one. Then this makes the last angle 90 degrees.

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Alika [10]

Answer:

the missing length would be 35 mm bc both of them are the same length

Step-by-step explanation: hope this helped

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3 years ago

What is m∠GDC? Explain

12345 [234]

Answer: what is ∠ ?

Step-by-step explanation:

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2 years ago

Use one or more properties to rewrite each expression as an expression that does not use parentheses.

maria [59]

Answer:

b + 9

Step-by-step explanation:

Given:

(b + 3) + 6

Required:

Rewrite expression without the parentheses.

SOLUTION:

(b + 3) + 6

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b + 3 + 6

Add like terms

b + 9

Thus:

(b + 3) + 6 = b + 9

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3 years ago

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Alex_Xolod [135]

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2 years ago

The National Center for Educational Statistics surveyed 5400 college graduates about the lengths of time required to earn their

fenix001 [56]

Answer:

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

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

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.645*\frac{1.9}{\sqrt{4500}} = 0.04$

The lower end of the interval is the sample mean subtracted by M. So it is 5.4 - 0.04 = 5.36 years.

The upper end of the interval is the sample mean added to M. So it is 5.4 + 0.04 = 5.44 years.

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

3 0

3 years ago