Ineed on #3 i don't understand systems of linear inequalities since i wasn't there when my teacher explained it

Shade the lower region of the you've already drawn and make sure it is a dashed line.

The point you have plotted is correct. Just draw a horizontal broken or dashed line through it and shade its upper region.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.