Posted by amy on .
given xz=72, xy=5x+3 and yz=8x9. is Y the midpoint of ling xz?
explain answer.

geometry 
helper,
xz = 72
xy = 5x + 3
yz = 8x  9
5x + 3 + 8x  9 = 72
13x  6 = 72
13x = 78
x = 6
So, for y to be the midpoint of xz,
xy = yz
5x + 3 = 8x  9
x = 6
5(6) + 3 = 8(6)  9
30 + 3 = 48  9
33 not = 39
y is not the midpoint