3 years ago

an envelope from the post office is 3 inches wide with a total area of 30 square inches what is the height of the envelope

Mathematics

1 answer:

matrenka [14]3 years ago

3 0

Jgthhmgmh,n Kong gmail,k Lukas out ivy. Go ftyfy

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Point L is the circumcenter of angle ABC. List any segment(s) congruent to each segment.

Vanyuwa [196]

I would help but I learned this in 5th grade sorry but hope you find a answer!

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3 years ago

A company has 3 mechanics in 8 electricians if an employee is selected at random what is the probability that they are an electr

morpeh [17]

Answer:

8/11

Step-by-step explanation:

3 mechanics and 8 electricians = 11 employees total

if one selected at random the possibility of the employee to be an electrician is 8/11

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3 years ago

Y=2x+3 -y=2x+1 solve the system of equations

MatroZZZ [7]

Answer:

Point form: (-1,1)

Step-by-step explanation:

y=2x+3, -y=2x+1

Point form: (-1,1)

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3 years ago

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]

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

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

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

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3 years ago