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liubo4ka [24]
3 years ago
5

Graph a line that contains the point (6,-5) and has a slope of - 2/3

Mathematics
1 answer:
just olya [345]3 years ago
7 0

Answer:

The equation of line with slope \dfrac{-2}{3}  and passing through points ( 6 , - 5 ) is

y = ( \dfrac{-2}{3} )x - 1   and graph shown

Step-by-step explanation:

Given as :

The points on the line is (6 , - 5)

The slope is m =  \dfrac{-2}{3}

Now, The equation of line with slope \dfrac{-2}{3} and passing through points ( 6 , - 5) is

y = m x + c is the standard line equation

Now , satisfying the points

So, - 5 = ( \dfrac{-2}{3} ) × 6 + c

or, - 5 = \frac{-2\times 6}{3}  + c

Or, - 5 = - 4 +  c

Or, c = - 5 + 4

∴  c = - 1

So, The equation of line with slope \dfrac{-2}{3}  and passing through points ( 6 , - 5 )

y = ( \dfrac{-2}{3} ) × x - 1

Now, Plotting the line on graph

For x = 0 , y = 0 - 1 = -1

For , y = 0 , x = \dfrac{-3}{2}

So, points as ( 0 , - 1) and ( \dfrac{-3}{2} , 0)

Hence , The equation of line with slope \dfrac{-2}{3}  and passing through points ( 6 , - 5 ) is y = ( \dfrac{-2}{3} )x - 1    and graph shown Answer

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Customers enter the waiting line at a cafeteria on a first-come, first-served basis. The arrival rate follows a Poisson distribu
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Answer:

The average number of customers waiting in line behind the person being served is 0.7619.

Step-by-step explanation:

In queueing problem, an M/M/1 queue model is an arrangement with a single queue, where arrivals at the queue are approximated by a Poisson distribution with mean <em>λ</em> and the service times follows an exponential distribution with mean <em>μ</em>.  

The mean number of arrivals in this system is given by:

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Here the variable <em>ρ</em> is defined as:

\rho=\frac{\lambda}{\mu}

From the average number of arrivals in the system, we can calculate the average number of  arrivals in the queue by subtracting the average number of arrivals in service.

That is,

\text{Average number of customers in the queue}=\frac{\rho}{1-\rho}-\rho =\frac{\rho^{2}}{1-\rho}

The information provided is:

The average number of arrivals of customers is, <em>λ</em> = 4.

The average service rate of a single server is, <em>μ</em> = 7.

Compute the average number of customers waiting in line behind the person being served as follows:

\text{Average number of customers in the queue}=\frac{\rho}{1-\rho}-\rho =\frac{\rho^{2}}{1-\rho}

                                                                   =\frac{(4/7)^{2}}{1-(4/7)}\\\\=\frac{(4/7)^{2}}{(7-4)/7}\\\\ =\frac{16}{49}\times \frac{7}{3}\\\\=0.7619

Thus, the average number of customers waiting in line behind the person being served is 0.7619.

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Answer:

16,002

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

In this question, we are asked basically to calculate the percentage decrease in Abby’s running time.

Mathematically, the percentage decrease equals: (new running time - old running time)/old running time * 100%

We input the values and proceed as follows:

Percentage decrease = (10-12)/12 * 100

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Since it’s a decrease, we just simply say that her running time decrease by 16.67%

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