A student determined that the ordered pair (1, - 2) is a solution of the following system 2x+y = 3
X+ y = -1
His reasoning was that the ordered pair satisfies the second equation x + y = -1, since 1 +(-2) = -1. What went wrong?

the battle of gettysburg is considered the "high water mark" of the confederacy because it marked the greatest advance of the confederate forces against the union.

b, 20 yards

step-by-step explanation:

-1   1/6.   you dont subtract the denominators

step-by-step explanation:

add the numbers under frequency to find the total number:

5 + 8 +7 + 4 + 0 +1 = 25

the answer is 25.