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3 years ago

Need help −5x = 15 !!!!!!!!!!!!

Mathematics

2 answers:

serious [3.7K]3 years ago

6 0

The variable x = -3

-BARSIC- [3]3 years ago

4 0

Answer:

x = -3

Step-by-step explanation:

−5x = 15

-5x/-5 = 15/-5

x = -3

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Brandon is bringing bottled water to a picnic. He has 4 full cases of bottles of water, and a bag with 8 more bottles. He has a

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2 years ago

A High School soccer team is going to Columbus, Ohio to see a professional soccer game. A coordinate grid is superimposed on the

finlep [7]

Answer: The coordinate are

( 5 , 2.5 )

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Step-by-step explanation:

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4 years ago

A chemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. The table show

nasty-shy [4]

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3 0

3 years ago

Read 2 more answers

The length of time for one individual to be served at a cafeteria is a random variable having an exponential distribution with a

Leya [2.2K]

Answer:

a) 0.25

b) 52.76% probability that a person waits for less than 3 minutes

Step-by-step explanation:

Exponential distribution:

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

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

In which $\lambda = \frac{1}{m}$ 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:

$m = 4$

a. Find the value of λ.

$\lambda = \frac{1}{m} = \frac{1}{4} = 0.25$

b. What is the probability that a person waits for less than 3 minutes?

$P(X \leq 3) = 1 - e^{-0.25*3} = 0.5276$

52.76% probability that a person waits for less than 3 minutes

3 0

3 years ago