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Sergio039 [100]
2 years ago
9

Worth 15 points please help

Mathematics
1 answer:
NeTakaya2 years ago
5 0
The answer is C 8f+4g
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Last​ year, a person wrote 126 checks. Let the random variable x represent the number of checks he wrote in one​ day, and assume
Arisa [49]

Answer:  The mean number of checks written per​ day  =0.3452

Standard deviation=0.5875

Variance  =0.3452

Step-by-step explanation:

Given : The total number of checks wrote by person in a year = 126

Assume that the year is not a leap year.

Then  1 year = 365 days

Let the random variable x represent the number of checks he wrote in one​ day.

Then , the mean number of checks wrote by person each days id=s given by :-

\lambda=\dfrac{126}{365}\approx0.3452

Since , the distribution is Poisson distribution , then the variance must equal to the mean value i.e. \sigma^2=\lambda=0.3452

Standard deviation : \sigma=\sqrt{0.3452}=0.5875372328\approx0.5875

6 0
3 years ago
A small theater sold 72 tickets for a
finlep [7]

Answer:

Adult tickets sold= 9x4 = 36

Senior tickets sold = 9x3= 27

Child tickets sold = 9 x 1 = 9

Step-by-step explanation:

If the parts for adult tickets changed within the 2 ratios given, we should have equated Ratio further. But here that is not 5e case. So, put both ratios together:

Senior:Adult:Child

3:4:1

Now,

Total number of parts 3+4+1=8

Number of tickets sold per part = 72/8 = 9

Therefore number of

Adult tickets sold= 9x4 = 36

Senior tickets sold = 9x3= 27

Child tickets sold = 9 x 1 = 9

Hope this helps.

Good Luck

5 0
3 years ago
If 20 chickens laid 120<br> eggs. At this rate, how<br> many eggs would 30<br> chicken lay?
svetoff [14.1K]

Answer:

180 eggs is the correct amount.

6 0
3 years ago
CAN YOU GUYS HELP MY SISTER OUT FOR POINTS AND BRINLESET?!?!?!?
Pani-rosa [81]

Answer:

1. 1/6

2. 1/9

3. 1/10

4.it would still be 9/10

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

I cant answer that one sorry

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

4 (im a little less confident in  this one :( )

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

1/4

4 0
3 years ago
Uh please help 8x-4y=-4 <br> -3x+4y=5 <br> Subtract second equation from the first
crimeas [40]

Answer:

11x -8y = -9

Step-by-step explanation:

8x-4y=-4

-3x+4y=5

Subtract the second equation from the first

8x-4y=-4

-(-3x+4y=5)

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

Distribute the minus sign

  8x-4y=-4

+(3x-4y=-5)

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

11x -8y = -9

5 0
3 years ago
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