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3 years ago

HELP ME PLEASE HELP HELP HELP WALLAHI HELP

Mathematics

1 answer:

enyata [817]3 years ago

8 0

9514 1404 393

Answer:

Step-by-step explanation:

The Pythagorean theorem tells you the square of the hypotenuse (longest side) is the sum of the squares of the other two sides. Let x represent the unknown side.

73² = x² +55²

5329 = x² +3025 . . . evaluate the squares

2304 = x² . . . . . . . . . subtract 3025 from both sides

48 = x . . . . . . . . . . . . take the square root of both sides

The exact length of the third side is 48.

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Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for t

rjkz [21]

Answer:

COV (all stocks) = 0.55

COV (stocks and bonds) = 0.82

Step-by-step explanation:

Coefficient of Variation is used to measure variability.

It is defined as the ration of standard deviation and the mean.

It can be used to compare variability of two population or two samples.

Formula:

$\text{Coefficient of Variation} = \displaystyle\frac{\text{Standard Deviation}}{\text{Mean}}$

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

x: 14, 0, 39, 25, 32, 27, 28, 14, 14, 15

$Mean = \frac{208}{10} = 20.8$

$Standard~Deviation = \sqrt{\frac{1169.6}{9} } = 11.39$

$Coefficient~of~Variation = \frac{11.39}{20.8} = 0.55$

y = 6, 2, 29, 17, 26, 17, 17, 2, 3, 5

$Mean = \frac{124}{10} = 12.4$

$Standard~Deviation = \sqrt{\frac{924.4}{9} } = 10.13$

$Coefficient~of~Variation = \frac{10.13}{12.4} = 0.82%$

Since coefficient of variation of x is less compared to y, thus it could be said bonds does not reduce overall risk of an investment portfolio.

6 0

3 years ago

Which of the following are not affected by the others outcomes

tankabanditka [31]

Whats not affected by the
others outcome

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3 years ago

What is the value of the expression if z=27

Annette [7]

Well think what z means and divide 27

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3 years ago

1. In each table, determine if y is proportional to x. Explain why or why not.

natka813 [3]

Answer:

3 is the answer

Step-by-step explanation:

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3 years ago

Using the completing-the-square method, rewrite f(x) = x2 − 8x + 3 in vertex form.

ikadub [295]

The vertex-form of a quadratic equation is $f(x)=a(x-h)^{2}+k$ , where (h, k) is the vertex of the parabola.

To complete the square of a quadratic expression in standard form, we write the coefficient of x as 2*b, then add and subtract $b^{2}$ .

$f(x)= x^{2} -8x+3$

$f(x)= x^{2} -2*4x+3$

so b=4, now add and subtract $4^{2}$ .

$f(x)= x^{2} -2*4x+ 4^{2}- 4^{2}+3$

$f(x)=( x^{2} -2*4x+ 4^{2})- 16+3$

$f(x)=(x-4)^{2}-13$

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4 years ago