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max2010maxim [7]
3 years ago
11

Plz help ASAP will mark brainlist

Mathematics
1 answer:
Vlad [161]3 years ago
8 0

Answer:

\huge \boxed{\mathrm{C}}

Step-by-step explanation:

The domain is the set of all possible values for x.

The function does not cross the line x = 1.

The domain is all real numbers except  1.

The range is the set of all possible values for y.

The function does not cross the line y = 0.

The range is all real numbers except 0.

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Can someone help me solve these three problems please??
Tasya [4]
I'll solve 21, and you then should be able to solve the rest on your own!

Since ADC is 135, that means that that whole angle is 135 degrees. In addition, since angles ADB and BDC add up to ADC, we get ADB+BDC=ADC=135=11x+9+7x=18x+9. Subtracting 9 from both sides, we get 126=18x. Dividing both sides by 18, we get x=7. Plugging that into 11x+9=BDC, we get 11*7+9=77+9=86
4 0
3 years ago
A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From
lutik1710 [3]

Answer:

a) z = 1.645

b) The should sample at least 293 small claims.

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, which means that the answer of question a is 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.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

M = 12, \sigma = 124.88. So

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

12 = 1.645*\frac{124.88}{\sqrt{n}}

12\sqrt{n} = 205.43

\sqrt{n} = \frac{205.43}{12}

\sqrt{n} = 17.12

\sqrt{n}^{2} = (17.12)^{2}

n = 293

The should sample at least 293 small claims.

8 0
2 years ago
Will mark as brainliest plz helpp​
almond37 [142]

x - √3y - 4 = 0 → <u>Choice</u><u> </u><u>A</u>

Step-by-step explanation:

x - 4 = √3y

x - 4 <u>- √3y</u> = √3y <u>- √3y</u>

x - 4 - √3y = 0

x - √3y - 4 = 0

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=7y%20%5Ctimes%204x%20-%205x%20%7B%3F%7D%5E%7B2%7D%20" id="TexFormula1" title="7y \times 4x - 5
lapo4ka [179]
The answer is i don’t know or I don’t care and what are we trying to find
5 0
3 years ago
Can someone please check to make sure I got this correct? I would appreciate if you showed your work so that I could compare wit
dmitriy555 [2]

Answer:

-4

Step-by-step explanation:

[√2(cos(3π/4) + i sin(3π/4))]⁴

(√2)⁴ (cos(3π/4) + i sin(3π/4))⁴

4 (cos(3π/4) + i sin(3π/4))⁴

Using De Moivre's Theorem:

4 (cos(4 × 3π/4) + i sin(4 × 3π/4))

4 (cos(3π) + i sin(3π))

3π on the unit circle is the same as π:

4 (cos(π) + i sin(π))

4 (-1 + i (0))

-4

8 0
3 years ago
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