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
Hunter-Best [27]
3 years ago
8

In a chess tournament, each player plays every other player exactly once. If it is known that 105 games were played, how many pl

ayers were there in the tournament?
Mathematics
1 answer:
diamong [38]3 years ago
3 0

Answer:

15 players played in the chess tournament.

Step-by-step explanation:

When there are 15 players, the first player plays 14 games and step aside.

remaining 14 player

next player plays 13 games. steps aside

remaining 13 players

next player plays 12 games. steps aside

remaining 12 players

next player plays 11 games. steps aside

remaining 11 players

.

.

.

.

Last player plays 1 game and steps aside

remaining 1 player who will not play against himself.

∴ Sum of all games played

= 14 + 13 + 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 105 games played

You might be interested in
Find the ratio a : b , if it is given that ...<br> 5a +3b =6b
sdas [7]

Answer:

3:5

Step-by-step explanation:

5a + 3b = 6b

5a=6b-3b

5a=3b

a/b= 3/5

a:b=3:5

8 0
3 years ago
One large box of birdseed can feed half a dozen parrots for 15 days. For how many days can this same large box of birdseed feed
iren [92.7K]
Box = b
Parrots = p
b/p = number of days it can support the parrots
Half a dozen = 6 (A dozen is 12)
1/6 = 15
To work out the percentage of '6' '5' is, use the equation
(5/6)*100 = 83.333....
Meaning that with one less bird, the box will support the birds for 16.666... (100 - 18.333...) longer
(15/100)*116.666... = 17.4999....
The box will sustain the parrots for 17.5 days
7 0
3 years ago
Use the diagram below to name the following
Mrrafil [7]
1. Line a and line b
2. Segment VX and segment YZ
3. Ray WY and Ray WZ
4. Angle YWV and Angle XWZ
5. Plane D and Plane VWX
6 0
3 years ago
Claire Reagan and Anthony deliver newspapers in the neighborhoods clear deliver 79 papers a day Reagan delivers 2490 papers a mo
Nata [24]

Answer:

90,747

Step-by-step explanation:

Clair delivery=79 per day

Total delivery per year=79×365 days

=28,835

Reagan delivery=2490 per month

Total delivery per year=2490×12 months

=29,880

Anthony delivery= 616 per week

Total delivery per year =616×52 weeks

=32,032

Total delivery altogether in a year=28,835+29,880+32,032

=90,747

4 0
3 years ago
Read 2 more answers
a survey indicates that 3 out of 5 doctors use brand x asprin. If 2000 doctors were surveyed, how many used brand x?
DiKsa [7]
The answer is 1200
3/5=x/2,000
2,000/5=400
3 x 400=1200
5 0
3 years ago
Read 2 more answers
Other questions:
  • How do you do -2(t + 4)
    13·2 answers
  • SinP=0.2, sinR=0.2 and r=12. Find the length of p.
    5·1 answer
  • A triangle has side links of 10 inches, 24 inches, and 26 inches. Is the triangle a right triangle? Explain.
    7·2 answers
  • Which statement represents the simplified form of the given equation and correctly describes the solution? 1/2(4x + 2) = 2(x + 1
    14·1 answer
  • I really need help :( I would really appreciate it:)
    15·1 answer
  • Tania bought 4 more pounds of pears than Wilma. Together, Tania and Wilma bought 18 pounds of pears.
    15·1 answer
  • What is 46/200 as a decimal
    10·1 answer
  • Angel bought 4 packages of streamers for 0.79$ each,2 rolls of wrapping paper for $3.99 each, a pair of good scissors for $12.18
    15·1 answer
  • Nigel paints 5/4 square yards in 1/3 hour. find the unit rate.
    9·2 answers
  • Which of these graphs represents a function?<br> A)<br> A<br> B)<br> B<br> C)<br> С <br> D)<br> D
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!