X+y= -4 2x -2y= 0 what best describes the solution to the system

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

F(x)=5/6x+3 which of the following is true

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.