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
Gelneren [198K]
3 years ago
11

One afternoon, they get together to play singles matches (one-on-one competitions).Every member of the club plays one match with

another member of the club, so twentymatches are held. In how many ways can this be arranged?
Mathematics
1 answer:
weeeeeb [17]3 years ago
3 0

Answer:

{40\choose 2}*{38\choose 2}*...*{2\choose 2}

Step-by-step explanation:

20 matches, so there is 40 players in the club.

First number too chole 2 first players for match you can do it in {40\choose 2}.

Now you have 38 players, becaus you chose 2. Now frim 38 player you can choose new 2 in {38\choose 2} ways. So and on... you will have ways to choose 20 matches in:

{40\choose 2}*{38\choose 2}*...*{2\choose 2}.

You might be interested in
Solve the equation 5x = 7 for x. Give an exact solution as a logarithm, and an
sladkih [1.3K]

Answer:

fraction x=7/5

mixed number x= 1 2/5

decimal x=1.4

Step-by-step explanation:

4 0
3 years ago
Four houses in a row are each to be painted with one of the colors red, blue, green, and yellow. In how many different ways can
Natali [406]

Answer:

Possible ways to paint the house is 108

Step-by-step explanation:

Total number of houses to be painted=4

Total number of colours to b used(red,blue,green and yellow)=4

Number of ways to paint the first house=4

Number of ways to paint the second house=3

Number of ways to paint the third house=3

Number of ways to paint the fourth house=3

Total number of ways to paint the 4 houses=4×3^3=108 ways.

3 0
3 years ago
Zane buys a rope that is 50 feet long. The cost of the rope is $0.35 per foot, including tax. What is the total cost, in dollars
Elan Coil [88]

Answer:

50x.35=17.50

Step-by-step explanation:

multiply length times amount per foot equals total cost

4 0
3 years ago
Anais bought 212 yards of ribbon. She had 1 feet 6 inches of ribbon left after trimming some curtains. How many inches of ribbon
victus00 [196]

Answer:

Step-by-step explanation:

3 0
3 years ago
Can someone please help me with this
postnew [5]
<h2>1.</h2><h3>1)</h3>

Put the given values of p and q in the factored form equation.

... f(x) = (x -(-1))(x -(-2)) . . . . p and q values put in

... f(x) = (x +1)(x +2) . . . . . . .simplified

<h3>2)</h3>

Multiplying the factors, we have

... f(x) = x(x +2) + 1(x +2) = x² +2x +1x +2

... f(x) = x² +3x +2

<h2>2.</h2>

We want to factor x³ -x² -6x. We notice first of all that x is a factor of all terms. Thus we have

... = x(x² -x -6)

Now, we're looking for factors of -6 that add up to -1. Those are -3 and 2. Thus the factorization is ...

... = x(x -3)(x +2)

<h2>3.</h2>

We want a description of the structure and an equivalent expression for

... 64x⁹ -216

We note that 64, 216, and x⁹ are all cubes, so this expression is ...

... the difference of cubes.

It can be rewritten to

... = 8((2x³)³ -3³)

and so can be factored as

... = 8(2x³ -3)(4x⁶ +6x³ +9)

7 0
3 years ago
Other questions:
  • If x2 +8x-4=x2+8, then 2x-3+?
    11·1 answer
  • A flying squirrel lives in a nest that is 5 meters high in a tree. To reach a fallen acorn that is 3 meters from the base of the
    12·1 answer
  • What is an equation of the line that passes through the point (-6,-3) and is parallel to the line 5x-3y=9?
    8·1 answer
  • Name 12 different rays
    12·1 answer
  • A poll of a random sample of1400 adults reported that respondents slept an average of 6.5 hours on weekdays and 7.2 hours on​ we
    11·1 answer
  • -2/9-(-3)<br> How do you solve it
    6·1 answer
  • 19 = 15 w- 4(3 w-1) solve for w
    15·1 answer
  • PLEASE HELP WORTH 25 POINTS!!!
    5·1 answer
  • Create a linear system whose solution is (-5, 3)
    13·1 answer
  • What is the measure of angle x?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!