The difficulty facing Louis and Clark was primarily

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

answer: the gettysburg address is a speech delivered by abraham lincoln at the november 19, 1863, dedication of soldier’s national cemetery, a cemetery for union soldiers killed at the battle of gettysburg during the american civil war.

explanation:

explanation:

the answer to your question is d because the clause conveys the tone of the man in the excerpt, which is arrogant and cocky. hope that .