During the 1950s: a. the federal government bypassed the south as a location for new military bases and shipyards. b. more efficient machinery and fertilization techniques the shift toward larger farms with fewer people working on them, particularly in the west. c. b and d d. the cold war stimulated western manufacturing in defense industries such as guided missiles. e. agricultural production in the west rapidly declined in the face of rising competition from world markets.

C. Both B and D are correct

Explanation:

Both are true. In the 1950s, spending in defense grew, and technology developed quickly. However, the technological revolution was not limited to defense. The green revolution meant the shift to more efficient farms and the migration of people to cities.  

the answer is b.2008 and 2012 were presidential election years.

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27