Loss
gain means you’re getting more, which is positive
450/313*10.5 = 15.09.... which is approx is 15
I think your question is asking how much money he owes. He owes $90
Simplify for -5/8*2/3= -5/12
-0.416 as a mixed number
Since there isn't a picture of the graphs, I attached one, of my graph, to this answer.
I'm also assuming (y2 2x+1) is actually (y< 2x+1).
Possible solutions are within the purple section of the attached image.
I hope this is helpful to you.