(a+b+c)/2. this is your answer. if it had the numbers i would solve it fully, but it only has variables.
given: s is the midpoint of rt
definition of midpoint: rs st
given: st xy
transitive property of congruence: rs xy
So, the fraction of races that he won was:

: you need ti divide the number of occurrences by the number of possibilities.
We can simplify this:

.
When we write it in decimals until the closest place, it's:
0.167 or 16.667%
Y=x+25 has the biggest increase so i think its B
Answer:
10
Step-by-step explanation:
2+10+18+14+6= 50
then divide by 5 to get mean = 10