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
IrinaK [193]
2 years ago
5

PLEASE HELP! I ONLY HAVE 15 MINS! WILL MARK BRAINLIEST! 20 POINTS! Suppose N coins lie heads up on a table. In one turn, you can

turn over any (N−1) coins. Is it possible that N coins could lay tails up in any number of turns, if
Mathematics
1 answer:
Romashka [77]2 years ago
6 0

Answer: it is only possible if N = 2.

Step-by-step explanation:

if you have N  heads up coins.

turn one, you turn N -1 coins up.

Now you have N - 1 coins tails up and one coin heads up.

Second turn, you turn N - 1 coins, (if you select the same N - 1 coins as before, you will end in the initial situation, so now we will change one coin, this time we will select the coin that is still heads up and we will leave one of the tails up unchanged)

Then we have N - 2 coins heads up and 2 coins tails up.

Now, we can select any N -1 coins to flip, and we will end with with N - 1 coins tail up and 1 coin heads up.

and this cycle will repeat.

Then the only situation is having N = 2.

Becuase when we have N -2 coins heads up and 2 coins tails up we will have: N - 2 = 0, so we have 0 coins heads up and 2 coins tails up.

This means that the statement is only true if N = 2.

You might be interested in
Help with 21 and not 22 please
densk [106]
X  ≥ 11

Hope that helps!


3 0
3 years ago
Plzzzz help quickly
Leviafan [203]
B. 3x-2y=6 would be the correct answer
5 0
3 years ago
Read 2 more answers
Will sides 4cm,5cm,13cm make a triangle ?
Katena32 [7]

Answer:

No it won't make a triangle

Step-by-step explanation:

Using pythagorean you have

4^2+5^2=13^2

Which is 41=169

To make a triangle these have to be equal so the sides won't make a triangle

5 0
3 years ago
If f(x)=(x-4 +6, then f(2)= ?<br> (1) 12<br> (3) -4<br> (2) 8<br> (4) 4
kykrilka [37]

Answer:

The answer to it is 4

Step-by-step explanation:

plug 2 to x and solve it

((2)-4)+6

(-2)+6

4

4 0
3 years ago
Write the standard equation of the circle with center (5, −4) and radius 3.
Maksim231197 [3]
:):):)):):):)):::):):):))
4 0
3 years ago
Other questions:
  • Show how to do this 3 2/3 - 1 7/8
    5·1 answer
  • 172,090=171,090+? <br>I am confused with my son homework
    14·2 answers
  • The United States is not a totally free market economy. Which of these is an example of the government limiting the actions of b
    8·2 answers
  • How many solutions does the equation 3(x+2)-10=4x-6+x have?
    9·2 answers
  • 11 + 4x = 16 + 3x what is the value of x
    10·2 answers
  • An element with mass 330 grams decays by 25.5% per minute. How much of the element is remaining after 5 minutes, to the nearest
    5·2 answers
  • Ed is doing a survey of popular colors for cars for a school report. He decides to take a sample by sitting near a busy intersec
    12·1 answer
  • Help me find what x is worth please
    5·1 answer
  • Mr. Hosley has a brother that is 6 years older. Together their ages are 106. How old is each of these siblings?
    6·2 answers
  • Given the triangle below, find the length of ZY. round your answer to the nearest tenth
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!