Does y= -(3)/(5)x-3 and y=(3)/(5)x-3 have a solution

Can someone pls ! pls answer all. no explanation needed..

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

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?