Answer:
it is x=27.if im wrong im sorry im 10 and in collage. im smart but i have a lot of work to do.
Step-by-step explanation:I have a lot of thinges on my mind.
Speed = Distance/Time
Runner Speed = 200/21.3 = 9.4 m/s
Swimmer Speed = 1.8 m/s
9.4 - 1.8 = 7.6 m/s
C
Answer:

or 10.39 rounded
Step-by-step explanation:
a²+b² =c²
6²+b²= 12²
36+b² = 144
-36 -36
b² = 108
