A seventh grade class is hosting a biathlon consisting of running and biking. Participants can choose to run 1 of 3 possible distances and bike 1 of 3 possible distances. Which tree diagram shows all the possible combinations of the biathlon

t= half of the arc subtended by t.

r= half of the arc subtended by r.  

t+r= half of the arc subtended by t + half of the arc subtended by r= half of 360=180

step-by-step explanation:

since no one answered yet i will give it a shot, not completely sure tho.

i think it should be y=cos(x+2pi), (third answer, answer c)

good luck.