closed dot means it includes that number so in this case x is least than or equal to -8 and open dot means it doesn't include that value so x is less than -3 and does NOT include -3
and for the y value it's pretty self explanatory if u just count it (i might be off by a little cuz the photo quality is kinda fuzzy but i hope u get the gist!)
To find this answer you first calculate what 3 odd numbers give you 9. These come out to 1+3+5. Then you just test it out which would then give you 21+23+25 = 69
