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2 years ago

It takes a car 2.5 h to go from mile marker 15 to mile marker 130. What is the average speed of the car?

Mathematics

2 answers:

adoni [48]2 years ago

8 0

Answer:

42 MPH

Step-by-step explanation:

Please give me brainliest :)

AysviL [449]2 years ago

6 0

50 MPH I think tell me if im wrong.

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The number of typing errors made by a typist has a Poisson distribution with an average of two errors per page. If more than two

wlad13 [49]

Answer: 0.6767

Step-by-step explanation:

Given : Mean = $\lambda=2$ errors per page

Let X be the number of errors in a particular page.

The formula to calculate the Poisson distribution is given by :_

$P(X=x)=\dfrac{e^{-\lambda}\lambda^x}{x!}$

Now, the probability that a randomly selected page does not need to be retyped is given by :-

$P(X\leq2)=P(0)+P(1)+P(2)\\\\=(\dfrac{e^{-2}2^0}{0!}+\dfrac{e^{-2}2^1}{1!}+\dfrac{e^{-2}2^2}{2!})\\\\=0.135335283237+0.270670566473+0.270670566473\\\\=0.676676416183\approx0.6767$

Hence, the required probability :- 0.6767

6 0

3 years ago

Brandon wants to test drive a Lamborghini car and he needs the key. Each key ring has 6 keys. If there are 9 key rings, how many

Harrizon [31]

Answer:

54 keys

Step-by-step explanation:

If there are 6 keys on each of the nine key rings, you times 6 by 9 to get 54.

6 0

3 years ago

Jose earned 50 points in a video game. He lost 45 points, earned 87 points, then lost 25 more points. Enter and evaluate an expr

Olin [163]

Answer:

50-45+87-25=67

Step-by-step explanation:

earning is + so +50

losing is - so -45

+87

-25

7 0

2 years ago

Which of the following changes is a chemical change? A ice me

Talja [164]

Answer:

Step-by-step explanation:

The question got caught off. Can't read any of the other examples. I can tell you though that ice melting is a physical change, not a chemical change.

5 0

2 years ago

Increase 12 in to the given ratio of 4:3

inysia [295]

Answer:

16:12

Step-by-step explanation:

(4+12)=16

16/4 = 4

4x3=12

Another method:

4---------3

16-------x

Cross multiplication

4x=16x3

4x=48

x=12

4 0

2 years ago