Does anyone know what this answer can be

1. what is the measure of ∠abc? what is the measure of ∠abd?

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

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?