Respuesta :

Pokefan

Answer:

-2.5

Step-by-step explanation:

-1/2 is the number it is being miltiplied by

teeaghaan78191
answer would be -2.5



because:
20 times -.5 is -10
-10 times -.5 is 5
5 times -.5 is -2.5

the reason for this geometric sequence, is each number being multiplied by -.5

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