Abrick of cheese is 3/4 inch thick. how many 1/10 inch thick slices can be cut from the brick of cheese

Harry’s soccer team plays 2 nonconference games for every 3 games that they play against conference opponents. if y represents the number of nonconference games and x represents the number of conference games, which equation best models this proportional relationship? a)y=2/3 x b)y=3/2 x c)y = 2x d)y = 6x

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Solve 3x-18=2y and 5x-6y=6 by elimination show work