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Nikolay [14]
3 years ago
14

Need help graphing these 8x + y = 4 x+y= -3

Mathematics
1 answer:
Tomtit [17]3 years ago
5 0

Answer:

y=-8x+4

y=-x-3

Step-by-step explanation:

for the first one start at 4 on the y-axis, then go down 8 and right 1

and for the second one start on negative 3 on the y-axis, then go down one and right one.

hope this helps

You might be interested in
4. The random variable x is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the pr
AnnZ [28]

Answer:

a) We have the mean number of events is interval(5.3 events in 10 minutes), which constitutes the Poisson probability distribution.

b) 5.3

c) 5.3

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

In which

x is the number of sucesses

e = 2.71828 is the Euler number

\mu is the mean in the given time interval.

a. What probability distributions' properties is this?

We have the mean number of events is interval(5.3 events in 10 minutes), which constitutes the Poisson probability distribution.

b. What is the expected value of the random variable x?

It is known that the mean number of occurrences in ten minutes is 5.3.

So the mean is \mu = 5.3

c. What is the variance of the random variable x?

In the Poisson probability distribution, the variance is the same as the mean. So the variance is 5.3.

5 0
3 years ago
Mary can type six letters in 20 minutes, Maggie can type five letters in 20 minutes, and Su Ying can type two letters in 20 minu
marin [14]

Answer:

70 minutes

Step-by-step explanation:

Mary can type the number of letters in 20 minutes = 6

Maggie can type the number of letters in 20 minutes = 5

Su Ying can type the number of letters in 20 minutes = 2

Working together they can type the number of letters in 20 minutes

= 6 + 5 + 2

= 13 letters

Working together they can type the number of letters in 1 minute = \frac{13}{20}

To type 45 letters time taken by them = \frac{45}{\frac{13}{20} }

                                                               = 45\times \frac{20}{13}

                                                               = \frac{900}{13}

                                                               = 69.230 ≈ 70 minutes

It will take them 70 minutes to type 45 letters.

8 0
3 years ago
The ratio Tim spends on math homework to science homework is 5 to 4. If he spends 40 minutes on math homework, how many minutes
natima [27]
I think it’s B honestly
8 0
3 years ago
A manager at an amusement park wants to know how popular the park's biggest roller coaster is. She counts the number of people w
valkas [14]

Answer: minimum = 0.5

maximum = 9.0

first quartile = 3

median = 5.5

third quartile = 7.5

Step-by-step explanation:

The histogram is shown below and used to obtain the various information

Time (hour) (X)     No of People (F)       FX

0.5                             19                            9.5  -- minimum = 0.5    

1                                20                            20

1.5                              21                             31.5

2                                 22                            44

2.5                              23                            57.5

3                                 24                             72 ----first quartile = 3

3.5                              26                             91

4                                 27                              108

4.5                             28                               126

5                                29                                145

5.5                            30                               165 --median/ inter quartile =5.5

6                               31                                186

6.5                           32                                208

7                               33                                 231

7.5                            34                                255-- third quartile = 7.5

8                               35                                280

8.5                            36                               306        

9                                37                              333 --- maximum = 9

T=85.5                   T = 507                      T=  2666.82     T = TOTAL

mean = sumFX/sumF  =   2666.82/507 = 5.26

Median = middle number = inter quartile =5.5 (507/2 = 253.5 = 254 and  add the frequency from top = 19+20+21+ 22+ 23+ 24+26+ 27+ 28+ 29 =269

and 254  close to 269 that is the frequency is within the range and corresponds to 5.5

first quartile = 1/4 *507 = 126.75 = 127 ( add the frequency from top= 19+20+21+ 22+ 23+ 24= 129 and 127 is close to 129)

third quartile = 3/4 * 507 = 380.25 ( add the frequency from top = 19+20+21+ 22+ 23+ 24+26+ 27+ 28+ 29+ 30+ 31+32+ 33+ 34 = 399 and 380 is close to 399 so the third quartile is 7.5

minimum is the one with lowest frequency = 0.5 at 19

maximum  or mode is the one with highest frequency = 9 at 37

4 0
3 years ago
Find the measure of the arc or central angle indicated
Korvikt [17]

Arcs get their angle measurement from the central angle they're in.

this one, has a central angle of 125°, thus the Arc is likewise the same 125°.

7 0
4 years ago
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