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Irina-Kira [14]
3 years ago
13

HELPPP FIRST ANSWER THAT IS ACCURATE WITH EXPLANATION GETS BRAINLIST 5 STARS AND THANKS ( DONT PLAGIARIZE )

Mathematics
2 answers:
Marta_Voda [28]3 years ago
8 0

Answer:

20 x 19 = 380 hands touched

380/2 = 190 handshakes

Step-by-step explanation:

Svetach [21]3 years ago
8 0

Answer:   190 handshakes

Step-by-step explanation:

The first will shake 19  hands, the second 18 hands and so  on......the 19 th will shake one hand

so 19+18+17+.....+1=19*20/2=19*10=190 handshakes

It is  ok now?

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3 years ago
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How to Factor -x^2-2x +15
andre [41]

Answer:

Step-by-step explanation:

-2x2-12x-15

Final result :

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Step by step solution :

Step  1  :

Equation at the end of step  1  :

 ((0 -  2x2) -  12x) -  15

Step  2  :

Step  3  :

Pulling out like terms :

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Trying to factor by splitting the middle term

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4 0
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MARKING BRAINLIEST .. pls
svetlana [45]

Answer:

0.5

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total = 12 marbles

6/12 are red

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1/2 are red

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0.5 probibility of picking red.

hope this helps :D

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