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dimulka [17.4K]
3 years ago
14

There are seven shuffled question cards left in a game. Kim has to pick two of them and answer them both correctly to win. What

is the greatest number of different pairs of question cards she can pick ?
Mathematics
1 answer:
Yakvenalex [24]3 years ago
4 0
"n choose k" gives you the number of possible unique combinations...

n!/(k!(n-k)!)

n=number of elements to choose from and k=the number of elements that you choose...in this case:

7!/[2!(7-2)!]

7!/[2!5!]

21

There are 21 possible different two question combinations that she can pick.


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an amusement parks goal is to sell 1 million tickets within the first four months of its being open how many more tickets xoes t
Fantom [35]

Answer:

since I don't know how many tickets they already have, I'm going to divide 1 million by 4 and say that they need to sell 250,000 tickets a month

Step-by-step explanation:

6 0
3 years ago
La edad de juan es un año menos que la tercera parte de la edad de la madre. si dentro de 5 años, la edad de la madre sera 10 añ
koban [17]

Usando un sistema de ecuaciones, se encuentra que Juan tiene 12 años e su madre tiene 39 años.

<h3>¿Qué es un sistema de ecuaciones?</h3>

Un sistema de ecuaciones es cuando dos o más variables están relacionadas y las ecuaciones se construyen para encontrar los valores de cada variable.

En este problema, las variables son:

  • Variable x: Edad de Juan.
  • Variable y: Edad de su madre.

La edad de juan es un año menos que la tercera parte de la edad de la madre, por eso:

x = \frac{y}{3} - 1

Dentro de 5 años, la edad de la madre sera 10 años mas que el doble de juan, por eso:

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

y + 5 = 2x + 20

Como x = \frac{y}{3} - 1:

y + 5 = \frac{2y}{3} + 18

3y + 15 = 2y + 54

y = 39

x = \frac{y}{3} - 1 = \frac{39}{3} - 1 = 13 - 1 = 12

Juan tiene 12 años e su madre tiene 39 años.

Puede-se aprender más a cerca de sistema de ecuaciones en brainly.com/question/20178040

#SPJ1

6 0
2 years ago
Find the value of x.
dolphi86 [110]

Answer: 10

Step-by-step explanation:

4 0
2 years ago
Can someone help me plz
Aliun [14]

Answer:

The answer is 4.

Step-by-step explanation:

8/3 ÷ 2/3 = 8/3 x 3/2 = 4

7 0
3 years ago
Read 2 more answers
Arie makes 3 giant sandwiches to share equally with 8 friends. Each friend gets a fraction of a sandwich. Choose which two whole
hodyreva [135]
3 giant Sandwiches,

8 friends,

Have to be shared equally,

Each friend gets = \frac{3}{8}

If we solve, we'll end with 0.375 Which is between 0 and 1.

So,
It will lie in between 0 and 1.

!! Hope It Helps !!
7 0
3 years ago
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