How were the incan people able to build their empire in such challenging geography?

Each of the cultures that settled the area, however, learned to adapt to their environment. In doing so they made scientific advances. In the steep mountains, people made terraces for farming. On the coast, they developed irrigation systems so they could farm in the desert. As a result, farming could support large populations both on the coast and in the highlands, where they built cities a full two miles above sea level.

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answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but

answer: in october 1962, an american u-2 spy plane secretly photographed nuclear missile sites being built by the soviet union on the island of cuba. president kennedy did not want the soviet union and cuba to know that he had discovered the missiles. he met in secret with his advisors for several days to discuss the problem.

explanation: