How did ice ages affect the land that became western washington

a. glaciers carved a large valley that later flooded and later became puget sound
( if you have answers to the full quick check , let me know.)

b. glaciers unclogged large rivers that later formed lake missoula

c. ice dams gave way to form scablands that support little life

d. coulees formed the columbia plateau

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases

d

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