2 years ago

Hello! Need Help please need it now

Mathematics

1 answer:

serg [7]2 years ago

3 0

Answer:

Step-by-step explanation:

6 to 12, 6.12, 6/12

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A random variable x takes four possible values, 0, 2, a, and b, where a and b are unknown numbers. if pr[x = 0] = 0.2, pr[x=2] =

Alexus [3.1K]

$\displaystyle\sum_{x\in\{0,2,a,b\}}\mathbb P(X=x)=1$
$\mathbb P(X=0)+\mathbb P(X=2)+\mathbb P(X=a)+\mathbb P(X=b)=1$
$0.2+0.4+0.3+\mathbb P(X=b)=1$
$\implies\mathbb P(X=b)=0.1$

$\mathbb E(X)=\displaystyle\sum_{x\in\{0,2,a,b\}}x\mathbb P(X=x)=2.8$
$0\mathbb P(X=0)+2\mathbb P(X=2)+a\mathbb P(X=a)+b\mathbb P(X=b)=2.8$
$0.8+0.3a+0.1b=2.8$
$0.3a+0.1b=2$

$a+b=6\implies0.3a+0.1b=0.2a+0.1(6)=2$
$0.2a+0.6=2\implies0.2a=1.4\implies a=7$

7 0

3 years ago

A rocket was launched from the ground and reached its maximum height of 36 feet at

makkiz [27]

Answer:

3 feet

Step-by-step explanation:

36/12=3

3 0

2 years ago

Whats (4.2×10^6)+(2.25 × 10^5) in scientific form

lys-0071 [83]

We are going to rewrite both numbers:
(4.2 × 10 ^ 6) = 4200000
(2.25 × 10 ^ 5) = 225000
Adding we have:
4200000 + 225000 = 4425000
Rewriting in exponential notation we have:
4425000 = 4,425 * 10 ^ 6
Answer:
(4.2 × 10 ^ 6) + (2.25 × 10 ^ 5) is equal to:
4,425 * 10 ^ 6

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3 years ago

I want you to pick your favorite basket ball player or team(from any year). Look up their last 11 games(for players who no longe

Nastasia [14]

Step-by-step explanation:

right now but I have no idea how much that would have to be in the same place as last week and he said it would be a lot of people are coming to see you and the girls are doing well and

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3 years ago

Read 2 more answers

A store sells two different packages of glue sticks as described below

GalinKa [24]

Answer

Package A: g = 18p

Package B: g = 12p

Step-by-step explanation:

For each equation, just multiple the number of glue sticks in a package times the number of packages in order to get the final number of glue sticks!

8 0

3 years ago

Hello! Need Help please need it now​

Hello! Need Help please need it now