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Yuri [45]
3 years ago
8

Answer???????????????

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
7 0

the answer correct is (5,3)

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the mean of the commute time to work for a resident of a certain city is 28.8 minutes. assume the standard deviation of the comm
hjlf

Answer:

The minimum percentage of the commuters in the city has a commute time within 2 standard deviations of the mean is 75%.

Step-by-step explanation:

We have no information about the shape of the distribution, so we use Chebyshev's Theorem to solve this question.

Chebyshev Theorem

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

An in general terms, the percentage of measures within k standard deviations of the mean is given by 100(1 - \frac{1}{k^{2}}).

Applying the Theorem

The minimum percentage of the commuters in the city has a commute time within 2 standard deviations of the mean is 75%.

3 0
3 years ago
I need to know what x equals. <br> HELP!!!!
SSSSS [86.1K]

Answer:

X=4

Step-by-step explanation:

4*4=16+7=23

8 0
3 years ago
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a model ship is built to a scale of 1 centimeter: 5 meters. the length of the model is 30 centimeters. what is the actual length
kifflom [539]
The answer is 150 centimeters
5 0
3 years ago
13. For what value of b would the following system of equations have an infinite number of solutions?
tiny-mole [99]

Answer:

b=2

Step-by-step explanation:

we have

9x+12y=21 -----> equation A

6x+8y=7b ----> equation B

we know that

If the system of equations have an infinite number of solutions then the equation A must be equal to the equation B

Multiply equation B by 1.5 both sides

1.5*[6x+8y[=7b*1.5

9x+12y=10.5b ----> equation C

Compare equation A and equation C

9x+12y=21 -----> equation A

9x+12y=10.5b ----> equation C

For the equations to be equal it must be fulfilled that

21=10.5b

solve for b

b=21/10.5

b=2

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3 years ago
Tickets for a play cost $11 for an adult and $80 for a child on Saturday night 300 tickets were sold the amount of money collect
Ratling [72]

Answer:

120 adults tickets were sold

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3 years ago
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