Lets look at number one. 31 + 27 + 29
We can go ahead and break it down if you want.
What's 31 + 27? That equals 58.
Now, we still aren't done with the problem because now we need to add 29.
29+58= 87
Answer:it’s 2.5
Step-by-step explanation:40-4x=50-8
4x=50
4x=10
2.5
X and Y
Hope it’s right
Wishing you luck
1,4
it’s y1-y2
———-
x1-x2