HELP IM TIMED! Which of the following statements is TRUE?
a.
Many tribes encroached upon reservations after successful peace negotiations with the U. S.
b.
Quakers were assigned to encroach upon Native American tribes in their negotiations.
c.
Tribal raids continued in reaction to American encroachment on the frontier.
d.
Quakers used encroachment to help Native Americans assimilate to life on reservations.

typical characteristics of global cities include all of the following except being culturally isolationist.

explanation:

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