What were the differences between flatboats, keelboats, and steamboats?

Keelboats were larger than flatboats, usually about seventy feet long and built with a pointed nose and stern. The deck was roofed over, and sported a mast for a sail. What set them apart was that keelboats could go upstream--but only by human muscle power.

1. true?

2. great britain, my assumption.

3. politburo

4. dissension

5. russia (did you misspell

6. berlin

7. romania

8. roads

9. mikhail gorbachev

10.   yugoslavia

11. cruel

12. bolsheviks

13. reduced the secret police

hopefully i you out with this! °ω°

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