Which statement best describes the vikings in medieval europe?

a)
they never became part of christian europe

b)
they created the largest land-based empire in history

c)
they were a roving group who raided towns to supplement their economy

d)
they were instrumental in to drive muslim invaders out of western europe

The correct answer is option C) "they were a roving group who raided towns to supplement their economy". Vikings were groups of Scandinavian seafaring pirates and traders who lived across the northwestern Europe between the 8th to 11th centuries. The best statement that fits the description of vikings is that they raided towns to supplement their economy, because as pirates, stealing from towns was one common practice of vikings.

the tallest building in the western hemisphere and the sixth tallest building in the world

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