trunefan4379 trunefan4379

03-09-2017
Mathematics

contestada

If 23 people shake each others hands once how many hands are shook in all

Respuesta :

Аноним Аноним

03-09-2017

This is the number of combinations of 2 from 23
23C2 = 23! / 2! 21!

A quick way to do this is 23*22 / 2 = 253

Answer Link

Otras preguntas

What role did the alliance system play in preventing Austria-Hungary and Serbia from coming to a settlement?

Three friends (A, B, and C) will participate in a round-robin tournament in which each one plays both of the others. Suppose that P(A beats B) = 0.4 P(A beats

1. What equation is modeled with the following number line? A. 7 – 3 = 4 B. 4 + 3 = 7 C. 3 + 4 = 7 D. 7 – 4 = 3

Electrical resistance is measured with ______________ Question 1 options: amps ohms volts watts

Factor the expression: 40x + 15

please help me with this ty so much

Triangle ABC and Triangle XYZ are similar. If the measure of angle A-30° and the measure of angle B-45 , what can you conclude? Options are in the picture

Need help with the following question number three is cut off you don’t have to help me with that question the first person who correctly answered the 4 questio

la salles colony fort

In the inequality 2x + $15,000 is less then equal to $65,000, x represents the amount of a car loan. Which phrase most accurately describes the loan amount?