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3 years ago

Whats 1 + 1? I NEED HELP IM IN COLLEGE

Mathematics

2 answers:

bulgar [2K]3 years ago

8 0

Oh god this one got me too it’s 2

alexgriva [62]3 years ago

8 0

I had to double check twice, but I’m pretty sure the correct answer is 2.

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In a small chess tournament, 20 matches were played. Find out how many people were involved if it is known that each participant

Nina [5.8K]

Answer:

5 players participated in the tournament.

Step-by-step explanation:

In a small chess tournament, 20 matches were played.

Let us assume that n number of players participated in the tournament

As in each game 2 players play, so the number of ways they can play is,

$=\ ^nC_2$

As they played 2 games with every other participant in the tournament.

So the total number of games is,

$=\ 2\times ^nC_2$

But it is given to be 20, so

$\Rightarrow \ 2\times ^nC_2=20$

$\Rightarrow \ ^nC_2=10$

$\Rightarrow \dfrac{n!}{2!(n-2)!}=10$

$\Rightarrow \dfrac{n(n-1)}{2}=10$

$\Rightarrow {n(n-1)=20$

As $5\times 4=20$ , so we get n=5.

Therefore, 5 players participated in the tournament.

5 0

2 years ago

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Polygon ABCD has the following vertices:

Nutka1998 [239]

I believe its D hope this helps

4 0

3 years ago

Find the degree of the monomial. -1.75K2 The degree is

Nikitich [7]

Answer:

Step-by-step explanation:

The degree of a monomial is simply the sum of all the exponents.

We can see that the only exponent belongs to k, and it is 2.

Thus, this is a second degree monomial.

The degree is 2.

And we are done!

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2 years ago

What is the value of the expression –5x4 when x = –2?

igomit [66]

It is definitely c, 80

4 0

2 years ago

Please tell me which are correct

Marina CMI [18]

Second, third, and fifth

4 0

3 years ago

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