12 passengers in 3 cars

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

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

Ineed me i stuck and i don’t want to get it wrong