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2 years ago

Help please it’s annoying

Mathematics

1 answer:

kap26 [50]2 years ago

8 0

I can’t see the picture

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In Fig. 6.28, find the value of x and y and then show that AB || CD.

poizon [28]

Answer:

Maybe 180° -50° = 130°

So I think x= 130°

Step-by-step explanation:

My opinion though

6 0

3 years ago

What x-values are a solution to the system? Select each correct answer the answers are

Brut [27]

I think the sabers are X=2 and X=-2

6 0

3 years ago

PLEASE HELP IM TIMED!! WILL GIVE BRAINLEST!!

Goshia [24]

Answer:

The answer is C

Step-by-step explanation:

An isosceles triangle has two angles that measure the same, so...

30 + 30 = 60

180 - 60 = 120

____________

45 + 45 = 90

180 - 90 = 90

____________

60 + 60 = 120

180 - 120 = 60

Yes

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90 + 90 = 180

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3 years ago

A survey was conducted that asked 1003 people how many books they had read in the past year. Results indicated that x overbar eq

Sergio [31]

Answer:

The 99% confidence interval would be given (11.448;14.152).

Step-by-step explanation:

1) Important concepts and notation

A confidence interval for a mean "gives us a range of plausible values for the population mean. If a confidence interval does not include a particular value, we can say that it is not likely that the particular value is the true population mean"

$s=16.6$ represent the sample deviation

$\bar X=12.8$ represent the sample mean

n =1003 is the sample size selected

Confidence =99% or 0.99

$\alpha=1-0.99=0.01$ represent the significance level.

2) Solution to the problem

The confidence interval for the mean would be given by this formula

$\bar X \pm z_{\alpha/2} \frac{s}{\sqrt{n}}$

We can use a z quantile instead of t since the sample size is large enough.

For the 99% confidence interval the value of $\alpha=1-0.99=0.01$ and $\alpha/2=0.005$ , with that value we can find the quantile required for the interval in the normal standard distribution.