Basically just do the problem backwards.
72÷9=8
72÷8=9
(0,2)
(1,5)
(2,8)
(3,11)
(4,14)
If you're looking for the value of z, then the answer should be -5.
2(x+3)= 3x-1
2x+6=3x-1
X=7
Therefore
YM = 7+3= 10
And by definition of midpoint YM=MZ so MZ=10
The race is 111.6 m long.
8 hurdles spaced 12.3 m apart means 7 spaces that are 12.3 m in length; 7*12.3 = 86.1
Add to this the distance to the first hurdle and the distance from the last hurdle:
86.1+15+10.5 = 111.6 m
