Midpoint is : (x1 + x2) / 2 , (y1 + y2) / 2
(-1,3)....x1 = -1 and y1 = 3
(7,-1)...x2 = 7 and y2 = -1
now we sub and solve
m = (-1 + 7)/2 , (3 - 1) / 2
m = (6/2, 2/2)
m = (3,1) <===
The answer is
<span>2 x minus 20 divided by 3 = 2x
equivalent of </span><span>
</span>(2 x -20) / 3 = 2x
for solving it, <span><span>(2 x -20) = 2x . (3) is sufficient
</span> </span>
so <span>2 x -20 = 6x </span><span> -20 = 6x - </span><span>2 x and -20 = 4x so x = -5</span>
First we must know the equation

So

And that would be
cubic inchesor B.Hope I helped!
100*1.2828...= 128.28282828..( so on..)
100x=128.28
then you do 100x - x = 128.2828...- 1.2828..
then we subtract the .282828... part
99x = 127
then divide boths sides by 99 and then x=127/99