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3 years ago

10

I'm having trouble with this problem what is 2+2

1 answer:

V125BC [204]3 years ago

7 0

Answer:

4

Step-by-step explanation:

2+2 =4

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In a group of eighteen people, each person shakes hands once with each other person in the group. How many handshakes will occur

miv72 [106K]

The number of handshakes that will occur in a group of eighteen people if each person shakes hands once with each other person in the group is 153 handshakes

In order to determine the number of handshakes that will occur among 18 people, that is, the number of ways we can choose 2 persons from 18 people.

∴ The number of handshakes = $^{18}C_{2}$

$^{18}C_{2} = \frac{18!}{(18-2)!2!}$

$^{18}C_{2} = \frac{18!}{16!2!}$

$^{18}C_{2} = \frac{18\times17\times16!}{16!\times2!}$

$^{18}C_{2} = \frac{18\times17}{2\times1}$

$^{18}C_{2} = \frac{306}{2}$

$^{18}C_{2} = 153$

∴ The number of handshakes = 153 handshakes

Hence. 153 handshakes will occur in a group of eighteen people if each person shakes hands once with each other person in the group.

Learn more here: brainly.com/question/1991469

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2 years ago

If tan 3x =<img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D" id="TexFormula1" title="\sqrt{x}" alt="\sqrt{x}" align="absmiddle"

aliya0001 [1]

Answer:

tan3x=√3

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:.x=20,80is your answer.

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3 years ago

Johanna used tiles to build a rectangler array with an array with an areavof 54.list all the possible dimensions of the array

lyudmila [28]

Assuming that all tiles must stay whole it would be:
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3 years ago

The equation for the circle is:

ivann1987 [24]

Use completion of sq method
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4 years ago

Which of the following proportions are true

faltersainse [42]

2:7 = 4:14 because each is equal to 2/7. If you simplify 4:14 by dividing by 2, it simplifies to 2:7.

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3 years ago

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