Which of the following is a technique for effective communication? a. use witticisms in conversations to keep it engaging b. keep eye contact to a minimum c. check for comprehension and accuracy d. use a sophisticated vocabulary Please select the best answer from the choices provided A B C D

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

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else

evaluate the evidence used to support it

explanation: