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lara31 [8.8K]
3 years ago
14

Read this E[2X^2 â€" Y].

Mathematics
1 answer:
djyliett [7]3 years ago
6 0

Looks like a badly encoded/decoded symbol. It's supposed to be a minus sign, so you're asked to find the expectation of 2<em>X </em>² - <em>Y</em>.

If you don't know how <em>X</em> or <em>Y</em> are distributed, but you know E[<em>X</em> ²] and E[<em>Y</em>], then it's as simple as distributing the expectation over the sum:

E[2<em>X </em>² - <em>Y</em>] = 2 E[<em>X </em>²] - E[<em>Y</em>]

Or, if you're given the expectation and variance of <em>X</em>, you have

Var[<em>X</em>] = E[<em>X</em> ²] - E[<em>X</em>]²

→   E[2<em>X </em>² - <em>Y</em>] = 2 (Var[<em>X</em>] + E[<em>X</em>]²) - E[<em>Y</em>]

Otherwise, you may be given the density function, or joint density, in which case you can determine the expectations by computing an integral or sum.

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sertanlavr [38]

Answer:

simplify -1-18

Step-by-step explanation:

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− 19

6 0
2 years ago
There are 1,994 strawberries picked from the farmif the strawberries are sorted equally into six bins, how many strawberries wil
irakobra [83]

Answer:

332

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3 years ago
Jamilla is buildiing a square sandbox with sides 7 feet long. She wants to put sand 2 ft deep in the box. How much sand should J
jonny [76]

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3 years ago
Read 2 more answers
L y l = 256<br> List 2 values of y
padilas [110]

Answer:

256, -256

Step-by-step explanation:

Absolute value simply removes the negative and does nothing to positive numbers

I think those were absolute value bars. not sure.

8 0
3 years ago
What is the answer for this:
cricket20 [7]

Step-by-step explanation:

Okay! To do this you need to have x on one side (isolate the variable) and also combine like terms. Like terms are terms with the same exponent and variable, like 8x and 6x.

8x+1=-6x-2 To combine like terms here we have to move -6x to the other side of the equation by adding it (using inverse operations). 8x+6x=14x

14x+1=-2 now subtract 1 from both sides.

14x=-3

Divide both sides by 14 and x=-3/14

Brainliest? :)

7 0
3 years ago
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