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3 years ago

3=x+3-5x what is the awnser

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

8 0

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Help! Please solve this.

lakkis [162]

Answer:

hump meeeeee wanna have sex ;)

Step-by-step explanation:

8 0

3 years ago

The scheduled arrival time for a daily flight from Boston to New York is 9:30 am. Historical data show that the arrival time fol

mamaluj [8]

Answer:

a) $E(A)=\frac{0+50}{2}=25 min$

$Sd(A) =\sqrt{208.3333 min^2}=14.43 min$

b) $P(A>25) = 1-P(A\leq 25)=1-\frac{25-0}{50-0}= 1-0.5 = 0.5$

Step-by-step explanation:

Part a

Let A the random variable that represent "The arrival time (minutes) for a daily flight from Boston to New York ". And we know that the distribution of A is given by:

$A\sim Uniform(a=0 ,b=50)$

We select our starting point a=0 representing 9:05 AM and the amount of minutes between 9:05 am to 9:55 am are 50 ans for this reason b =50

For ths uniform distribution the expected value is given by $E(X) =\frac{a+b}{2}$ where X is the random variable, and a,b represent the limits for the distribution. If we apply this for our case we got:

$E(A)=\frac{0+50}{2}=25 min$

And the variance is given by:

$Var(A)= \frac{(b-a)^2}{12}=\frac{(50-0)^2}{12}=208.3333 min^2$

And the standard deviation by definition is just the square root of the variance:

$Sd(A) =\sqrt{208.3333 min^2}=14.43 min$

Part b

If we convert 9:30 AM to our scale we know that we have 25 minutes between 9:05 AM and 9:30 AM.

For this case we want to find this probability: $P(A>25)$

And we can find this probability using the complement rule like this:

$P(A>25) = 1-P(A\leq 25)$

And we can use the cumulative distribution function given by:

$F(A) = \frac{A-a}{b-a}$

And we got:

$P(A>25) = 1-P(A\leq 25)=1-\frac{25-0}{50-0}= 1-0.5 = 0.5$

5 0

3 years ago

It takes Jonas 7 1/4 minutes to run the mile. It takes Mario 8 5/12 to run the mile. How much faster is Jonas than Mario?

Elanso [62]

We know that

<span>It takes Jonas ---------> 7 1/4 minutes to run the mile
7 1/4-------> (7*4+1)/4------> 29/4 minutes

</span>It takes Mario ---------> 8 5/12 minutes to run the mile
8 5/12-------> (8*12+5)/12------> 101/12 minutes

multiply (29/4) by (3/3)-------> 87/12

[101/12]-[87/12]------> 14/12 -------> 7/6 -------> 1 1/6 minutes

the answer is
1 1/6 minutes

4 0

3 years ago

Read 2 more answers

What is the value of v if 13v = 65

NemiM [27]

Answer:

$v=5$