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2 years ago

Simplify: 3(9 + 2d) + 4d

Mathematics

2 answers:

Inga [223]2 years ago

6 0

Answer:

27 + 10d

Step-by-step explanation:

PilotLPTM [1.2K]2 years ago

4 0

Answer:

10d+27

Step-by-step explanation:

Rearrange terms

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)

(

)

Distribute

(

)

Combine like terms

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g If the economy improves, a certain stock stock will have a return of 23.4 percent. If the economy declines, the stock will hav

dusya [7]

Answer:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

Step-by-step explanation:

We can define the random variable of interest X as the return from a stock and we know the following conditions:

$X_1 = 23.4 , P(X_1) =0.67$ represent the result if the economy improves

$X_2 = -11.9 , P(X_1) =0.33$ represent the result if we have a recession

We want to find the standard deviation for the returns on the stock. We need to begin finding the mean with this formula:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

And replacing the data given we got:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

7 0

2 years ago

Select the correct answer.

Sati [7]

The answer would be A because if you combine all the like terms you will get A as a result.

-2x^2+8x-9+4x+7x^2+2
-2x^2+7x^2 combine both of these and it will get you 5x^2
And then you would do 8x+4x which would be 12x and lastly you would -9+2 which would be -7 so the answer is A.

Hope this helps!!

3 0

2 years ago

Read 2 more answers

Hi.<br>i like you<br>yuejrh

Lerok [7]

Answer:

Huh

Step-by-step explanation:

4 0

2 years ago

Which best describes how to slove the equation below? 26x=74

Zarrin [17]

Answer:

Step-by-step explanation:

Simplifying

26x = 74

Solving

26x = 74

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '26'.

x = 2.846153846

Simplifying

x = 2.846153846x

this is google respond

=74/26

x=37/13 this is mines mak me brainest plz

4 0

2 years ago

The surface area of a cube is 216 sq.cm. What is it’s volume

PtichkaEL [24]

First we need to find it’s length/width which we can do by dividing 216 by the amount of faces it has and then divide that result by 2

216/6=36
36/2=18

And volume is pretty much just 3 times that answer

3(18)=54

The volume is 54 cm^3

7 0

3 years ago