You need to add x1 and x2 then divide by two, then add y1 and y2
The 2nd one
i just guessed but my instincts tell me it's right, and they are usually right. But if u really need help explaining, go ask a teacher or parent!! i mean i'm a singer, NOT a geologist
Answer:
x=-3
Explanation:
-8=-8(x+4) divide -8 into the other side
1= x+4 then subtract 4 on both sides
-3=x
