Help! I don't know what to answer! In the 16th century there were 2 models to describe the structure of the solar system: Geocentric model and Heliocentric model.

1. Describe the Geocentric model and state four key aspects of the model

2. Describe the Heliocentric model and state four key aspects of the model

the correct answer that would best complete the given statement above would be option b. expanding civil services. diocletian and constantine paved the way for foreign invasion by dividing the empire, creating administrative bureaucracies and reorganizing the military, except for expanding civil services. hope this answer .

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explanation:

the first forms of writing came from them in the form of pictographs around 3100 bc.

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13

they lost control of territory in the middle east, but preserved turkey's political independence.