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Dafna11 [192]
3 years ago
15

Two unfair dice are rolled independently. The first has 0.5 probability of landing on a 6,with equal probability for the other f

aces. The second has 0.1 probability of landing on a 1,with equal probability for the other faces.LetXbe the sum of the numbers appearing on the two dice, and letYbe the product.Compute the following, leaving your answer as a single decimal number:(a)E(X)(b)E(Y)(c)V(X)Note:Calculator use is allowed.

Mathematics
1 answer:
Luda [366]3 years ago
6 0

Answer:

Step-by-step explanation:

This question will be better solved with the aid of a detailed diagram, kindly check the below attached images to get the step by step answer to this question.

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Please ΔEFU ~ ΔVWU. Find the length of UF.
koban [17]
<h3>Answer: UF = 11</h3>

=======================================================

Explanation:

In EFU, we see that EU are the first and last letters. In VWU, we see that VU are the first and last letters. This order is important to be able to pair EU with VU

So EU/VU is one ratio

The other ratio is UF and UW, which are the last two letters of EFU and VWU respectively. So the other ratio is UF/UW

Set the ratios equal to each other and solve for x

EU/VU = UF/UW

7/35 = x/55

7*55 = 35*x ... cross multiply

385 = 35x

35x = 385

x = 385/35 .... divide both sides by 35

x = 11

UF = 11

------------

Or you could note how UV = 35 is exactly 5 times larger compared to EU = 7

That must mean WU = 55 must also be 5 times larger compared to UF = x

So,

WU = 5*UF

55 = 5x

5x = 55

x = 55/5

x = 11

UF = 11

This is similar to the previous section because UV/EU = 35/7 = 5 is the scale factor.

4 0
4 years ago
5,000 is invested at an interest rate of 8% compounded annually. how much is the investment return after 20 years?​
iren [92.7K]

Step-by-step explanation:

5k×8×20

_______ =800

100

6 0
3 years ago
Read 2 more answers
What is the value of x?<br><br><br><br> Enter your answer in the box.<br><br><br> °
pashok25 [27]

Answer:

x = 127 degrees

Step-by-step explanation:

The sum of the interior angles is (n-2)180, so in this case it would be

(6-2)180

(4)180

720

Then you can substitute the given angle measurements to get the equation:

112+133+128+100+120+x = 720

593+x = 720

x = 127

8 0
3 years ago
Please help me with these two questions, 10 points for each so in total 20!!
saul85 [17]

Answer:

\large\boxed{Q2.\qquad C.\ -2x+y=-2}\\\boxed{Q4.\qquad C.\ y=3x+12}

Step-by-step explanation:

Q2:

The point-slope form of an equation of a line:

y-y_1=m(x-x_1)

m - slope

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (4, 6) and (6, 10). Substitute:

m=\dfrac{10-6}{6-4}=\dfrac{4}{2}=2

y-6=2(x-4)           <em>use distributive property</em>

y-6=2x-8      <em>add 6 to both sides</em>

y=2x-2          <em>subteact 2 from both sides</em>

-2x+y=-2

Q4:

The slope-intercept form of an equation of a line:

y=mx+b

m - slope

b - y-intercept

Put the slope m = 3 and the coordinateso f the point (-2, 6) to the point-slope form of an equation of a line:

y-6=3(x-(-2))

y-6=3(x+2)         <em>use distributive property</em>

y-6=3x+6     <em>add 6 to both sides</em>

y=3x+12

4 0
3 years ago
HELP PLEASE WILL GIVE BRAINLIST
rodikova [14]

Answer:

Let R be the greater radius and r be the smaller radius

A) Area of the sidewalk = R^2 - r^2   - This can be the expression

B)  = 3.14

=(R^2-r^2)

=(11^2-9^2)

=(121-81)

=*40

That was the simplified expression

Answer = 3.14 * 40 = 125.6m^2

Step-by-step explanation:

4 0
3 years ago
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