Please help if I don’t turn it in by tonight I’ll get after school detention

Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

What’s the domain of this function? fastttt

Two lines parallel to the same plane are parallel to eachother