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fomenos
3 years ago
9

Please help me with this

Mathematics
1 answer:
katovenus [111]3 years ago
4 0

Answer:

z=23

Step-by-step explanation:

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What is the solution of the system? Use the elimination method. 2x+y=206x−5y=12 Enter your answer in the boxes.
astraxan [27]

Answer:

The answer to your question is:   x = 7; y = 6

Step-by-step explanation:

                                             2x+y=20             ( 1 )  Multiply by 5

                                             6x−5y=12            ( 2 )

                               5 (2x+y=20)    = 10x + 5y = 100

                                          10x + 5y = 100

                                            6x − 5y =   12             Eliminate y

                                          16 x        = 112

                                           x = 112 / 16

                                           x = 7

                                 2(7) + y = 20                 Substitution

                                 14 + y = 20

                                 y = 20 - 14

                                 y = 6

7 0
4 years ago
AMERICAN AIRLINES HAS A POLICY OF BOOKING AS MANY AS 15 PEOPLE ON AN AIRPLANE THAT CAN SEAT ONLY 14. (PAST STUDIES HAVE REVEALED
Blizzard [7]

Using the binomial distribution, there is a 0.0874 = 8.74% probability that not enough seats will be available.

<h3>What is the binomial distribution formula?</h3>

The formula is:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • n is the number of trials.
  • p is the probability of a success on a single trial.

For this problem, the values of the parameters are given by:

n = 15, p = 0.85.

The probability that not enough seats will be available is P(X = 15), as the only outcome in which not enough seats will be available is when all 15 people who bought the ticket show up, hence:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 15) = C_{15,15}.(0.85)^{15}.(0.15)^{0} = 0.0874

0.0874 = 8.74% probability that not enough seats will be available.

More can be learned about the binomial distribution at brainly.com/question/24863377

#SPJ1

8 0
1 year ago
I don't get this answer someone plz help out
tangare [24]
1) we calculate the total cost of all items:

Total cost=27 * $1.25 + 5 *1.99$ + 1*1.5$=$33.75 + $9.95 + $1.5=$45.2

2)we express the total cost in cents:
$1=100 cents

$45.2=$45.2 * (100 cents /$1)=4520 cents.

3)we divide 4520 cents  among the number of pupils

Each student will pay=4520 cents / 26 =173.84... cents≈174 cents.

Answer: Each student will pay 174 cents.
6 0
3 years ago
Julie and Tim are both cable subscribers. Julie pays 70$ per month plus an additional $4.25 for each movie she orders. Tim’s pay
Nikolay [14]

Answer:

Julie's bill came to $121 for the month in which she ordered 12 movies.

Step-by-step explanation:

Let x represent the number of movies ordered.

Julie:  $70 + ($4.25/movie)x, and ...

Tim:    $49.50 + ($5.50/movie)x

If Julie ordered 12 movies last month, then her bill came to

$70 + ($4.25/movie)(12 movies) = $70 + $51 = $121

Please be clearer about what you want here.  Are you refering to Julie or to Tim or to both when you write, "an equation that best represents the amount of movies?"

7 0
4 years ago
Kara bought 5 pounds of Brand X roast beef for $43. Cameron bought 3 pounds of Brand Y roast beef for $27. Which brand of roast
Luba_88 [7]
Hey there Jefferymcdougl1,

Answer:

Brand X:
5 pounds = $43
1 pound = $43 / 5
              = $8.60

Brand Y:
3 pounds = $27
1 pound = $27 / 3
              = $9
Thus, Brand X is a better buy as Brand Y costs $0.40 more than Brand x

Hope this helps :D

<em>~Natasha♥</em>
4 0
4 years ago
Read 2 more answers
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