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LiRa [457]
3 years ago
10

Someone check my answers please

Mathematics
1 answer:
Anna007 [38]3 years ago
4 0

Answer:

its right

Step-by-step explanation:

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What is the value of X?
rodikova [14]

Answer:

102

Step-by-step explanation:

triangle area = 180 degrees

straight line = 180 degrees

180 - 127 = 53

49

49 + 53 + 3rd angle = 180

3rd angle = 78

180-78 = x

x = 102

4 0
3 years ago
You observe a portfolio for five years and determine that its average annual return is 13% and the standard deviation of its ret
horrorfan [7]

Answer:

There is a 95% probability that the portfolio would not loose more than 30% of its value.

Step-by-step explanation:

The confidence interval for proportions (<em>p</em>) is:

CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

The information provided is:

\hat p = 0.13\\\sqrt{\frac{\hat p(1-\hat p}{n}} =0.21

For 95% confidence level the critical value of <em>z</em> is:

z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

The 95% confidence interval for average annual return is:

CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.13\pm 1.96\times0.21\\=0.13\pm 0.4116\\=(-0.2816, 0.5416)\\\approx(-28\%, 54\%)

The lower limit of the 95% confidence interval is -28%.

This implies that the portfolio would not loose more than 28% of its value.

Thus, there is a 95% probability that the portfolio would not loose more than 30% of its value.

6 0
3 years ago
Make a table of ordered pairs for the equation.
stira [4]
y \: = \: \frac{ - 1}{3} x \: + \: 1
When y = 0,
0 \: = \: \frac{ - 1}{3} x \: + \: 1 \\ \frac{ 1}{3} x \: = \: 1 \\ x \: = \: 3
When x = 0,
y \: = \: 0 \: + \: 1 \\ y \: = \: 1
Therefore, Ordered pairs are (0,1), (3,0), etc.

4 0
3 years ago
A right triangle has an area of 33 mm2 and a height of 12mm. How long is the base of the triangle
klasskru [66]

Answer:

5.5

Step-by-step explanation:

6 0
2 years ago
Y= -4x -1 write this equation in standard form
Alexandra [31]

Answer:

4x + y = -1

Step-by-step explanation:

To get both variable terms on the same side, you can add 4x. Its coefficient will then be positive, and all coefficients are mutually prime, so you're done.

4x +y = 4x -4x -1 . . . 4x added to both sides

4x + y = -1 . . . . . . . simplify

5 0
3 years ago
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