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3 years ago

Simplify the following expression. -16 - 8/2 + 25 ÷ 5 + 1 -18 6 10 -6

Mathematics

1 answer:

Andrews [41]3 years ago

6 0

The answer is -6. Thought there is a chance I am wrong. Need an explanation?

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Suppose that the distance, in miles, that people are willing to commute to work is an exponential random variable with a decay p

garik1379 [7]

Answer:

m = $\frac{1}{20}$
μ = 20
σ = 20

The probability that a person is willing to commute more than 25 miles is 0.2865.

Step-by-step explanation:

Exponential probability distribution is used to define the probability distribution of the amount of time until some specific event takes place.

A random variable X follows an exponential distribution with parameter m.

The decay parameter is, m.

The probability distribution function of an Exponential distribution is:

$f(x)=me^{-mx}\ ;\ m>0, x>0$

Given: The decay parameter is, $\frac{1}{20}$

X is defined as the distance people are willing to commute in miles.

The decay parameter is m = $\frac{1}{20}$ .
The mean of the distribution is: $\mu=\frac{1}{m}=\frac{1}{\frac{1}{20}}=20$ .
The standard deviation is: $\sigma=\sqrt{variance}= \sqrt{\frac{1}{(m)^{2}} } =\frac{1}{m} =\frac{1}{\frac{1}{20}} =20$

Compute the probability that a person is willing to commute more than 25 miles as follows:

$P(X>25)=\int\limits^{\infty}_{25} {\frac{1}{20} e^{-\frac{1}{20}x}} \, dx \\=\frac{1}{20}|20e^{-\frac{1}{20}x}|^{\infty}_{25}\\=|e^{-\frac{1}{20}x}|^{\infty}_{25}\\=e^{-\frac{1}{20}\times25}\\=0.2865$

Thus, the probability that a person is willing to commute more than 25 miles is 0.2865.

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3 years ago

What is the expression below? 26 + 67 + 3x2³

Alenkasestr [34]

Answer:

24x+93

That's the answer to the equation that was what you were asking for right?

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2 years ago

Find 55% of 164 I don't get it I need help can someone help me like right now please

IgorC [24]

$55\%\ of\ 164\ is...\\\\ \frac{55}{100} \times \frac{164}{1} =\\\\55*164=9020\\100*1=100\\\\ \frac{9020}{100}\approx90\\\\20\ is\ left\ over.\\\\90.20\\\\\\55\%\ of\ 164\ is\ 90.2$

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3 years ago

How many solutions does 3x = 2x + 4 have

Sloan [31]

Answer:

One Solution: x = 4

Step-by-step explanation:

Step 1:

3x = 2x + 4 Equation

Step 2:

3x - 2x = 4 Subtract 2x on both sides

Answer:

x = 4

Hope This Helps :)

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2 years ago

Gretchen worked in the ticket booth for 20 minutes. Kevin worked in the ticket booth 5 times longer than Gretchen.

slamgirl [31]

The Answer Is D! Hope This Helps You

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2 years ago