ADVICE: I have a class in which there are 5 teachers and 15 students, and for the past 3 days I've been trying to receive help and nobody has helped me. Any suggestions? Will give brainliest!

that should mean 3 students per teacher. i would reccomend sending an email or having a conference on the attention given to you something like that

Explanation:

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j