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
Elanso [62]
3 years ago
7

At a party, everyone shook hands with everybody else. There were 66 handshakes in total. How many people were at the party?

Mathematics
2 answers:
Zanzabum3 years ago
4 0
12 people were at the party.

You can choose 12 people to be one person, and 11 to be a person they are shaking hands with.  However, this allows us to choose person A, then person B, or Person B, then Person A.  We don't want to double-count this case, so we divide by 2.  12*11/2=66, so 12 works.
olga55 [171]3 years ago
3 0
At a party, everyone shook hands with everybody else. There were 66 handshakes in total. How many people were at the party?12 people. 
Hope i helped, and good luck!
You might be interested in
48 girls, 41 boys, and 5 teachers sat in the gym. Write the ratio of girls to boys in three ways.
Anika [276]

Answer:

D

Step-by-step explanation:

The answer is D because the question is asking for girls to boys. So anything that has 5 in it is wrong because it isn't asking for teachers, which eliminates A. So since it is asking <u>girls</u><u> </u><u>to</u><u> </u><u>boys</u> the number order has to be 48 then 41 because it is asking for girls first then to boys. So that makes B wrong. When it comes to the fraction part of the ratio the first number it is asking for (which is girls) <em><u>alwa</u><u>ys</u></em> goes on top. So that eliminates C which leaves only answer to be D.

7 0
3 years ago
Amanda is playing her new video game, Track Runner. At first, she earned 20 points for
Reika [66]

Answer: no the answer should have been -5 not 5 because Amanda lost more points than she gained

Step-by-step explanation:

20+(-25)=-5

5 0
3 years ago
AYYYYYYYYYYYYYYOOOOOOOOOOOOOOOOOOO<br> Get Ya free 25
nalin [4]

Answer:

Ok

Step-by-step explanation:

4 0
3 years ago
4z-(-3z) can you help me​
Korvikt [17]

Answer:

7z

Step-by-step explanation:

4z-(-3z).

Two negatives equal a positive only <u>when they are right next to each other.</u>

4z+3z=7z. Hope this helps :D

8 0
3 years ago
if a mobile was sold for Rs.24408 after allowing 10% discount on the marked price and adding 13% VAT.Findthe discount amount.
Kazeer [188]

Answer:

<em>Hi</em><em>,</em><em> </em><em>there</em><em>!</em><em>!</em><em>!</em><em>!</em>

<em>See</em><em> </em><em>explanation</em><em> </em><em>in pictures</em><em>. </em>

<em>I</em><em> </em><em>hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>you</em><em>.</em><em>.</em><em>.</em>

6 0
3 years ago
Other questions:
  • In a litter of kittens, 2 had gray fur, 3 had orange fur, and 4 had black fur. If two kittens are randomly selected, which combi
    13·2 answers
  • Write in slope-intercept form an equation of the line that passes through the points (−3,2) and (1,−10)
    5·1 answer
  • PLEASE ANSWER QUICKLY!!
    6·1 answer
  • 5/7 × 4/3 ÷ 15/21 =​
    10·2 answers
  • you put your money into a savings account, and it warns interest find the simple interest paid on your investment of $1675 with
    15·1 answer
  • Solve for n -4.2n-1.7=2.08
    6·1 answer
  • Simplify (3x2 + 2x - 3) (x + 5)​
    13·1 answer
  • Please help quicklyyy!!!
    12·1 answer
  • The formula for area of a parallelogram is A = bh, where A is the area, b is the length of the base, and h is the height. A para
    15·1 answer
  • Marley had $120 to buy books. She purchased 6 books and has $18 left.<br> How much was each book?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!