What is different about the expectations of the last few generations of people on earth?

hi huh

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13

new england colonies endured bitterly cold winters and mild summers

the colonists made their living fishing, whaling, and shipbuilding. the fish included cod, mackerel, herring, halibut, hake, bass and sturgeon.

b. the treaty of ghent, which ended the war, had already been signed.