Please help. is due today. Thank you​

Two lines parallel to a third line are parallel to each other. always sometimes or never

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Atown has a population of 17000 and grows at 2.5% every year. to the nearest year, how long will it be until the population will reach 19600?