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3 years ago

Solve for x if you do ill give brainliest

Mathematics

2 answers:

kicyunya [14]3 years ago

7 0

Answer:

x = 9

Step-by-step explanation:

6² = 4·x

36 = 4x

x = 36/4

x = 9

Zepler [3.9K]3 years ago

4 0

Answer: x=9

X/6= 6/4

Crosses multiply

4x=36

Divide by 4

X=9

Step-by-step explanation:

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Miguel cut 1/4 from a round pie. Mariah cut a piece from the same pie with an angle measure of 60 degrees. Who cut the larger pi

MatroZZZ [7]

Answer:

Miguel

Step-by-step explanation:

Since the pie is round it is a circle, and all circles have 360 degrees in total. Miguel cut 1/4 of the pie and 1/4 x 360 = 90. 90 is greater than 60.

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3 years ago

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Identify if the scale object is a reduction or an enlargement of the actual picture.

galben [10]

Answer:

enlargement

Step-by-step explanation:

Actual picture is smaller than the scaled one

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A simple random sample of electronic components wil be selected to test for the mean lifetime in hours. Assume that component li

Serjik [45]

Answer:

189 components must be sampled.

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:

$\alpha = \frac{1 - 0.99}{2} = 0.005$

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

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

Now, find the margin of error M as such

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

Assume that component lifetimes are normally distributed with population standard deviation of 16 hours.

This means that $\sigma = 16$

How many components must be sampled so that a 99% confidence interval will have margin of error of 3 hours?

n components must be sampled.

n is found when M = 3. So

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

$3 = 2.575\frac{16}{\sqrt{n}}$

$3\sqrt{n} = 2.575*16$

$\sqrt{n} = \frac{2.575*16}{3}$

$(\sqrt{n})^2 = (\frac{2.575*16}{3})^2$

$n = 188.6$

Rounding up:

189 components must be sampled.

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3 years ago

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Answer:

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Step-by-step explanation:

30 possibilities for the first one and 29 other for the second one

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3 years ago

The figure below is made of two identical triangular prisms. What is the volume of the figure?

ANTONII [103]

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Step-by-step explanation:

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2 years ago