Is (-1,2) a solution of the system y > x and x + y > 0

Step-by-step explanation:

for it to be a solution, it has to satisfy both inequalities ... not just one

y > x ... (-1,2) ... x = - 1 and y = 2 ... now we sub

2 > - 1 ... 2 is greater then - 1 ... this is true

x + y > 0 ... (-1,2) ... x = - 1 and y = 2 ... sub

-1 + 2 > 0

1 > 0 ... 1 is greater then 0 ... this is true

so (-1,2) IS a solution to this system because it satisfies both inequalities