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
lisabon 2012 [21]
2 years ago
15

Eight people enter a tennis tournament which each person must play every other person exactly once Determine the number of games

that will be played.
Mathematics
1 answer:
LiRa [457]2 years ago
7 0

Answer:

The answer is 28. Hope it helps :D

You might be interested in
What is Quantum theory?
Mariana [72]

Answer:

a theory of matter and energy based on the concept of quanta, especially quantum mechanics.

Step-by-step explanation:

there really is no step by step explanation :)

8 0
3 years ago
I need help asap please!!!!
Brut [27]
So, the easiest thing to do here is to add up the numbers of each option to find the number most similar to the solution of (-4/5)(3/5)(-6/7)(5/6) which is approximately equal to 0.34.
The product of expression A is -0.25
The product of expression B is 0.50
The product of expression C is 3
The product of expression D is -0.05625

So, first of all, we can rule out choices A and D because they are both negative, whereas 0.34 is not. Now, we just have B and C, and clearly, B is much closer to 0.34 than C is, so B is the correct answer. I hope this helps! :)
3 0
3 years ago
In a lottery game, a player picks six numbers from 1 to 21. If the player matches all six numbers, they win 40,000 dollars. Othe
Darina [25.2K]

Answer:

The expected value of this game is -$0.26.

Step-by-step explanation:

Expected value:

Each possible earning/loss multiplied by it's probability.

Probability:

Number of desired outcomes divided by the number of total outcomes.

In this question, the order in which the numbers are chosen is not important. So we use the combinations formula to solve.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

Probability of winning:

Desired outcomes:

The 6 correct numbers, so D = 6

Total outcomes:

6 numbers from a set of 21. So

T = C_{21,6} = \frac{21!}{6!15!} = 54264

Probability:

p = \frac{1}{54265}

Expected value

\frac{1}{54265} probability of earning 40,000.

\frac{54264}{54265} probability of losing 1. So

E = \frac{40,000}{54265} - \frac{54264}{54265} = -0.26

The expected value of this game is -$0.26.

7 0
3 years ago
A rectangle is 7 meters. The perimeter is 24. What is the width?
lana [24]
P=2(L+W)
if length=7
and P=24
24=2(7+W)
divide both sdes by 2
12=7+W
minus 7both sides
5=W
width=5meters
7 0
2 years ago
Mike had a 16in by 20in photo he cropped 3in off of each side of the photo what are the perimeter and area of the photo
mihalych1998 [28]

Answer: perimeter: 30 in. Area: 221 in

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is 165 % fraction simplified
    12·2 answers
  • Find the number of terms, n, in the arithmetic series whose first term is 15, the common difference is 4, and the sum is 3219. P
    11·1 answer
  • The function F(x) is described below.
    14·1 answer
  • A bucket is 20cm in diameter at the open end, 12cm in diameter at the bottom, and 16cm deep. To what depth would the bucket full
    5·1 answer
  • FAST PLEASE!! Emma weighs half as much as Sonya. Sonya weighs 120 pounds. How much
    13·1 answer
  • Which of the following properties is shown in the equation below? 3 × ( 6 × 2 ) = ( 3 × 6 ) × 2
    8·1 answer
  • Mari and Rob are making a poster for the science fair. They need to figure out how much a rock that weighs 7 pounds on Earth wou
    9·1 answer
  • Find 20% out of 55<br> plzzzzzzz
    9·1 answer
  • The following expression is written by some students: A+B=C. if ''A'' is always twice the value of ''B''. what is the value of '
    14·1 answer
  • One-half the sum of two numbers is 12. One of the numbers is three more than two times the other number. What are the two number
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!