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3 years ago

I need help as soon as possible please

Mathematics

1 answer:

tatiyna3 years ago

6 0

The centroid divides the median into a 2:1 ratio. So, 9x-9=4x+16. We solve and get x=5. Therefore, OB is 36, and BE is half, 18.

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Find the percent of decrease from 6 to 5.

lozanna [386]

Answer:

Use this

Step-by-step explanation:

3 0

3 years ago

Assume that when adults with smartphones are randomly selected, 46% use them in meetings or classes. If 6 adult smartphone use

ohaa [14]

The probability is 0.1253.

This is binomial because 1) there are two outcomes (either do or do not use in class); 2) the events are independent of each other (the probability of one person using a phone in class does not affect the probability of another person doing this); and 3) there is a fixed number of trials (9).

Read more on Brainly.com - brainly.com/question/9178881#readmore

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4 years ago

The Wheel Shop sells other kinds of vehicles. There are bicycles and go-carts in a different room of the shop. Each bicycle has

enyata [817]

Number of bicycles is 15
number of go karts is 6

3 0

3 years ago

The length of time for one individual to be served at a cafeteria is an exponential random variable with mean of 6 minutes. Assu

denis-greek [22]

Answer:

43.46% probability that the person will need to wait at least 9 minutes total

Step-by-step explanation:

To solve this question, we need to understand conditional probability and the exponential distribution.

Conditional probability:

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

Expontial distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

In this question:

Event A: Waited at least 4 minutes.

Event B: Waiting at least 9 minutes.

The length of time for one individual to be served at a cafeteria is an exponential random variable with mean of 6 minutes.

This means that $m = 6, \mu = \frac{1}{6}$

Probability of waiting at least 4 minutes.

$P(A) = P(X \geq 4) = P(X > 4)$

$P(A) = P(X > 4) = e^{-\frac{4}{6}} = 0.5134$

Intersection:

The intersection between a waiting time of at least 4 minutes and a waiting time of at list 9 minutes is a waiting time of 9 minutes. So

$P(A \cap B) = P(X > 9) = e^{-\frac{9}{6}} = 0.2231$

What is the probability that the person will need to wait at least 9 minutes total

$P(B|A) = \frac{0.2231}{0.5134} = 0.4346$

43.46% probability that the person will need to wait at least 9 minutes total

8 0

4 years ago

3. Solve -3x-11 = -5*<br> Pls text Instagram n1ck562_

ANTONII [103]

Answer:

-2

Step-by-step explanation:

You basically are doing addition property of equality where you are adding 11 to both sides to cancel out the -11 after the -3x.

You get -3x is equal to 11 plus -5 which is 11-5 giving you 6.

You have -3x is equal to 6

so you divide both sides by -3 to get x

6 divided by -3 is -2 because -2 times -3 is 6

X is equal to -2

4 0

3 years ago