What did blacks hope to gain by boycotting the buses in Montgomery, Alabama? They wanted the Montgomery Bus Company to begin transporting students to public schools.

They thought they would be arrested and the publicity would help their cause.

They wanted to see the fares go down so they could afford to ride.

They hoped to use economic pressure to end segregation on the buses.

D

Explanation:

they figured by not riding the bus it would cause the bus company to be forced to change their policy towards Blacks by hurting them financially

what are local authorities doing to fix the problem

explanation:

what are local authorities doing to fix the problem

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