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2 years ago

This graph plots the number of wins last year and this year for a sample of professional football teams.

Mathematics

1 answer:

irina [24]2 years ago

7 0

Answer:

C.5, Because when you you add the line of best fit on the graph it goes through the 5 point right over 4 wins won last year.

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A system has one each of two different types of components in joint operation. Let X and Y denote the random lengths of the live

RSB [31]

Answer:

The value of E(Y/X) is 2.

Step-by-step explanation:

As the complete question is not given, thus the complete question is found online and is attached herewith.

So the joint density function is given as

$f(x,y)=\left \{ {{\dfrac{x}{8}e^{-\dfrac{x+y}{2}} \,\,\,\,0 \leq x,0\leq y \atop {0}} \right.$

So the marginal function for X is given as

$f_x=\int\limits^{\infty}_0 {f(x,y)} \, dy\\f_x=\int\limits^{\infty}_0 \dfrac{x}{8}e^{-\frac{x+y}{2} }dy\\f_x=\int\limits^{\infty}_0 \dfrac{x}{8}e^{-\frac{x}{2}}e^{-\frac{y}{2} }dy\\f_x= \dfrac{x}{8}e^{-\frac{x}{2}}\int\limits^{\infty}_0e^{-\frac{y}{2} }dy\\f_x= \dfrac{x}{4}e^{-\frac{x}{2}}$

Now

$f(Y/X)=\dfrac{f(X,Y)}{f(X)}\\f(Y/X)=\dfrac{\dfrac{x}{8}e^{-\frac{x+y}{2} }}{\dfrac{x}{4}e^{-\frac{x}{2}}}\\f(Y/X)=\dfrac{1}{2}e^{-\frac{y}{2} }$

Now the value of E(Y/X) is given as

$E(Y/X)=\int\limits^{\infty}_0 {yf_{Y/X}} \, dy \\E(Y/X)=\int\limits^{\infty}_0 {y\dfrac{1}{2}e^{-\frac{y}{2} } }\, dy\\E(Y/X)=\dfrac{1}{2}\dfrac{\sqrt{2}}{(\dfrac{1}{2})^2}=2$

So the value of E(Y/X) is 2.

3 0

3 years ago

Dave's dog is 1 decade and 2 years 9months 3days old Dave is half as old as his dog how old is dave

victus00 [196]

Answer:

dave is 6 years old depending on which way you are halfling

Step-by-step explanation: the dog is 12 years and 9 months old

dave would be 6 i believe unless its going the other way then i have no clue

a decade is 10 years btw.

3 0

3 years ago

Read 2 more answers

Which values are with in the range of the piecewise defined function?

zepelin [54]

Answer:

y = -6; -3; 0

Step-by-step explanation:

To quickly solve this problem, we can use a graphing tool or a calculator to plot the equation.

Please see the attached image below, to find more information about the graph

The equation is:

f(x) = 2x+2 , x < -3

f(x) = x, x = -3

f(x) = - x -2 , x > -3

From the graph, we can see that the values are

y = -6; -3; 0

4 0

3 years ago

Read 2 more answers

An elevator travels 310 feet in 10 seconds at that speed how far can this elevator travel

frez [133]

Answer:

1,860 per minute and 111,600 per hour

6 0

3 years ago

Thinking the perimeter of the rectangle is 3x + 2 + x + 3x + 2 + X.

givi [52]

They are both right because the first expression is the perimeter but expanded in terms of length.The second expression is shortened to be a factor expression but they both represent the length.
The benefit of the first one is you can see how it’s expanded and plug the numbers in and the second one is more easy to plug in the numbers with ease.

7 0

3 years ago