Who thought that he could reach the east by sailing across the Atlantic Ocean?

Christopher Colombus

Explanation:

With a crew of 90 men and three ships—the Niña, Pinta, and Santa Maria—he left from Palos de la Frontera, Spain. Columbus reasoned that since the world is round, he could sail west to reach “the east” (the lucrative lands of India and China)

yes i think there would be volunteers

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