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Gnesinka [82]
3 years ago
11

Write a story or situation that can be represented by the given equation. 4a+5=12a−11

Mathematics
2 answers:
Len [333]3 years ago
5 0

Answer:

a=4

Step-by-step explanation:

4a+12a=  11

Leto [7]3 years ago
3 0

Answer:

          a = 4

Step-by-step explanation:

STEP 1)  4a - 16  =   4 • (a - 4)

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It is A

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If y varies directly with x, with k=0.75,what is the value of y when x=12
erma4kov [3.2K]

Answer:

9

Step-by-step explanation:

y=x

y=kx

substitute k for 0.75 and x for 12 in the above equation

y=0.75×12

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7 0
2 years ago
Find the value of X 90 58 122 32 <br> PLEASE ANSWER NOWW<br> 20pts
Viktor [21]

Answer:

58

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
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
4. Joe likes sports. He has 4 soccer medals, 1 tennis medal, 3 swimming medals and 5
Lady_Fox [76]

Answer:

4:3

Step-by-step explanation:

He has 4 Soccer Medals, 3 Swimming Medals

So it would be 4:3

6 0
3 years ago
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