1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Xelga [282]
3 years ago
5

The class has n students, and n is an even number. The students are forming teams to work on their homework. Each team has exact

ly 2 students and each student has to appear in exactly one team. How many distinct ways are there to form the teams for the class?
Mathematics
1 answer:
yuradex [85]3 years ago
8 0

Answer:

Distinct ways  in which they all can form the teams for the class = n(n-1)

Step-by-step explanation:

Total numbers of students = n (even number)

Number of student in each team = 2

Number of distinct ways are there to form the teams for the class:

P^{n}_{k}=\frac{n!}{(n-k)!}

where = n = number of elements  = n

k = number of elements choose = 2

P^{n}_{2}=\frac{n!}{(n-2)!}=\frac{n\times (n-1)\times (n-2)!}{(n-2)!}

=n\times (n-1)

You might be interested in
Collect like terms<br>14. x2 + 2x - x - 2​
ipn [44]

Answer:

the answer is 3x minus 2 because when u combine the x terms it's 3x and 2 doesn't have any other like term

6 0
3 years ago
Please who can help me?
Natasha2012 [34]
Sorry, very late response since I had other matters to attend to.
Question 1:
A: Incorrect; if that was the case, on day 1, the price would be 150. Instead here, according to the graph, on day 1 the price is 30. 

B: Incorrect; the slope, or rate of change, is 30.
[Note: To calculate the slope, we can take two points (I've chosen points (1,30) [1] and (2,60) [2] for you) and use the formula \frac{y^2 - y^1}{x^2 - x^1}.  \frac{60 - 30}{2 - 1} ⇒ \frac{30}{1}. \frac{x}{1} = x, therefore \frac{30}{1} = 30.]

C; Correct; each day the price increases by (+) 30.

D: Incorrect; the line does not show a constant decrease, but instead a constant increase.

Question 2:
A: Most likely this answer choice. The equation seems to be in slope-intercept form on accounting that the equation has mx and b. M has the x directly after it while the b is a number that stands alone. [Note: Numbers that stand alone and without a variable are constants.] B stands for the y-intercept/initial value, or amount started with. 

In short:
Q1: C
Q2: A

4 0
4 years ago
A shark swims an average of 25 miles an hour. At this rate, how many miles will the shark swim in 9 hours?
Marrrta [24]

Answer: in this question the easiest way to find an answer is by cross multiplying ....i hope i am right

Step-by-step explanation:

1 hour=25miles

9hours=x

cross multiply which will give u

1x=25x9

1x=225

x=\frac{225}{1}

x=225miles

hope this helps

OR

1hour= 25miles

9hours=x

so u know in 9hours the miles swam will obviously will be more so if it is more less will divide

which will be=\frac{9}{1}×21 =225 miles

HOPE THIS HELPSSSSSSSSSS!!!!!!!!!!!!!

7 0
3 years ago
What is 5/4 as decimal
Allushta [10]

Answer:

1.25

Step-by-step explanation:

1.25 you divide 5/4

5 0
3 years ago
Read 2 more answers
Klaus was replacing the roof on his house. He used 420 nails to attach all the pieces of wood. Each piece of wood needed 7 nails
Sladkaya [172]

Answer:


20


Step-by-step explanation:


if 7 nails are required for each piece of wood, you must determine how much wood you have in total by dividing the amount of nails by 7.


If you have used 40 nails out of sixty, you 20 left because


60-40=20

4 0
3 years ago
Other questions:
  • Which point is located at (-1, 3)?<br><br> please help asapp
    11·2 answers
  • Half the square of a number is 18. What is the number
    12·2 answers
  • Property<br> Find the product of
    10·1 answer
  • What is 1.1 in fraction form?
    13·1 answer
  • What statement is true for the equation 3x - 3x - 2 = -2
    11·1 answer
  • Negative 2 minus 6 times a number equals 19
    11·2 answers
  • How do I solve for an answer for this? <br> 16k-24<br> Find the GCF
    9·1 answer
  • Convert the measurement as indicated.<br> 16 yd to feet<br> 16 yd = ft
    8·2 answers
  • Please explain solution
    5·1 answer
  • PLEASE HELPPPPPPPPP! 44 POINTS
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!