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Alex_Xolod [135]
3 years ago
13

Compare 7 x 103 and 5 x 102.

Mathematics
1 answer:
Vsevolod [243]3 years ago
6 0
<span>C) 7 x 103 is twice as large as 5 x 102</span> 
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Complete the steps in solving the quadratic function 7x – 9 = 7x2 – 49x by completing the square.
Lena [83]

Answer:

it's actually 28+/-√721/7

Step-by-step explanation:

6 0
2 years ago
Traffic flow is traditionally modeled as a Poisson distribution.A traffic engineer monitors the traffic flowing through an inter
babymother [125]

Answer:

There is a 6.07% probability that during next 2 min exactly 5 cars passing an intersection are from state.

Step-by-step explanation:

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.

In this problem, we have that:

A traffic engineer monitors the traffic flowing through an intersection with an average of 6 cars per minute. So in 2 minutes, 12 cars are expected to flow through the intersection.

If 75% of vehiclesare from state, what is the probability that during next 2 min exactly 5 cars passing an intersection are from state?

We want to know how many of these cars are from state. In 2 minutes, 0.75*12 = 9 cars from the state are expected to pass the intersection, so \mu = 9.

We want to find P(X = 2).

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

P(X = 5) = \frac{e^{-9}*9^{5}}{(5)!} = 0.0607

There is a 6.07% probability that during next 2 min exactly 5 cars passing an intersection are from state.

7 0
3 years ago
Kim works 4 hours more each day than jill does, and jack works 2 hours less each day
Nadusha1986 [10]
Where's the rest of the question
6 0
3 years ago
Read 2 more answers
The classroom has 20 students and
Fed [463]

Answer:

2 students out of 20 have blonde hair.

Step-by-step explanation:

20 was the total number if u divide 20 ÷ by 10 = 2

so 2 is 1/10

because is only 1 out of 10

5 0
2 years ago
Read 2 more answers
The questions are in the images pls answer all or your answer will be deleted because this is for a lot of points and im losing
PilotLPTM [1.2K]

1)

x + 2y = 21

+ -x + 3y = 29

--------------------------

5y = 50

y = 10

x + 2(10) =21

x = 1

2)

6x + 6y = 30

+ 15x - 6y = 12

-------------------------------

21x = 42

x = 2

6(2) + 6y = 30

6y = 18

y = 3

7 0
3 years ago
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