Alexis is creating a table. She is placing different rights and responsibilities under headings that relate to their role in our system of government. A. Maintaining unity

B. Maintaining Democracy

C. Maintaining the Rule of Law

D. Maintaining the Rights of Citizens

The answer is  

B. Maintaining Democracy

Explanation:

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate

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