I don’t know what to do to get the constant of proportionality?

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out