WWI 5 Questions Completed: 22 of 40
1.
Tanks were a military technology that were first used in WWI.
True
False
Book

True

Explanation:

The first use of tanks on the battlefield was the use of British Mark I tanks at the Battle of Flers-Courcelette

the manhattan project's indispensable man

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