All of the following, except one, are examples of the geographic concept of human-environment interaction. which is not?
a.
the electricity in robert’s home comes from a hydroelectric plant.
b.
in the pacific northwest, umbrellas outsell sunglasses.
c.
in the united states, people are able to participate in government.
d.
emily’s family enjoyed a two-week vacation at yellowstone national park.

In the United States, people are able to participate in government

Explanation:

which of the following was specifically permitted by the emancipation proclamation?

free african americans were allowed to fight for the confederacy.

free african americans were allowed to enlist in the union army and navy.

enslaved people in border states were allowed to move to the north.

enslaved people in border states were allowed to become confederate citizens.bg j5yrn ehti5wrq4iu h3r etu

x=4, y=4

step-by-step explanation:

y=2x-4;

x+2y=12

we can use substitution since the first equation is solved for y

where ever you see y in the second equation, replace it with 2x-4

x + 2(2x-4) = 12

distribute the 2

x+4x-8 = 12

combine like terms

5x-8=12

add 8 to each side

5x-8+8=12+8

5x=20

divide by 5

5x/5 = 20/5

x =4

we still need to solve for y

y = 2x-4

we know x =4

y = 2(4) -4

y = 8-4

y=4