at a party 136 handshakes took place. each person shook hands exactly once with each of the others present. how many people were at the party?

9514 1404 393

  17

Step-by-step explanation:

The number of handshakes among n people is n(n -1)/2. Then ...

  n(n -1)/2 = 136

  n(n -1) = 272 = 17×16*

  n = 17

There were 17 people at the party.

* This factoring can be facilitated by recognition that √272 ≈ 16.5, the number midway between the consecutive factors.

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.

7

step-by-step explanation:

i'm assuming you need to figure out how many campers go into each tent.

i got the answer by:

24+4=28

28/4=7