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dolphi86 [110]
3 years ago
5

Jimmy purchased 7 adult ticket and 6 student tickets for a total of $126. Jenny purchased 4 adult ticket and 2 student tickets f

or a total of $52.
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
8 0

Answer: The asnwer  is so easy litteraly  AOC 2024

Step-by-step explanation:

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How do you solve (y=x-4)=(2x+y=5) using substitution?
liberstina [14]
Y = x-4

2x + y = 5
2x + (x-4) = 5
3x - 4 = 5
3x = 9
x = 3
7 0
3 years ago
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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:

  • <em>m</em> = \frac{1}{20}
  • <em>μ</em> = 20
  • <em>σ </em>= 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 <em>X</em> follows an exponential distribution with parameter <em>m</em>.

The decay parameter is, <em>m</em>.

The probability distribution function of an Exponential distribution is:

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

<u>Given</u>: The decay parameter is, \frac{1}{20}

<em>X</em> is defined as the distance people are willing to commute in miles.

  • The decay parameter is <em>m</em> = \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.

7 0
3 years ago
Is this correct? Or are the numbers wrong
Taya2010 [7]

Answer:

I think that's right. But the angle in the corner actually might be the 28 degrees. One sec this question is a little confusing

Step-by-step explanation:

8 0
2 years ago
Plz help meeee -28=n(-7)
In-s [12.5K]

Answer:

n=4

Step-by-step explanation:

-28 divided by -7 is 4

4 0
3 years ago
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A cylinder has a radius of 30 ft and a height of 19 ft. What is the exact surface area of the cylinder?
Ad libitum [116K]
A=2\pi r(r+h)\\&#10;A=2\pi\cdot30\cdot(30+19)\\&#10;A=60\pi\cdot49\\&#10;A=2940\pi\hbox{ ft}^2
4 0
3 years ago
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