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3 years ago

Yo could someone help me

Mathematics

2 answers:

Finger [1]3 years ago

8 0

Answer:

D (X and Z)

Step-by-step explanation:

Helen [10]3 years ago

3 0

Answer:

Step-by-step explanation:

Because congruent lines are 42 degrees

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10) BRAINLIEST & 10+ POINTS!

Nadya [2.5K]

Answer:

Complementary angles are angles that add up to 90°

To find the complementary angle for an angle of 70° subtract it from 90°

That's

90° - 70° = 20

Hope this helps

3 0

3 years ago

Read 2 more answers

Please hurry

maksim [4K]

Answer:

it should be : x²= 15²+8²

x²= 225+64

x²=289

x=√289

x=17

7 0

3 years ago

What is the sum of the square root of negative two and the square root of negative eighteen

Contact [7]

The answer to Cindyelias82 question is 5.65685425i
Square Root (-2)+Square Root(-18)=5.65685425i

4 0

3 years ago

A Confidence interval is desired for the true average stray-load loss mu (watts) for a certain type of induction motor when the

Vaselesa [24]

Answer:

A sample size of 35 is needed.

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:

$\alpha = \frac{1-0.95}{2} = 0.025$

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 $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the width W as such

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

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

How large must the sample size be if the width of the 95% interval for mu is to be 1.0:

We need to find n for which W = 1.

We have that $\sigma^{2} = 9$ , then $\sigma = \sqrt{\sigma^{2}} = \sqrt{9} = 3$ . So

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

$1 = 1.96*\frac{3}{\sqrt{n}}$

$\sqrt{n} = 1.96*3$

$(\sqrt{n})^2 = (1.96*3)^{2}$

$n = 34.57$

Rounding up

A sample size of 35 is needed.

3 0

3 years ago

9x -2 > 5 < 3x<br><br> Find the third side?

Ksju [112]

The length of the third side is a-2. :))

5 0

2 years ago