Help with any please ?

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?

Find the distance between the pair of points a(-1,8) and b(-8,4)

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?