Solve the following problems: Given: AB = 21, OB = 10 Find: m∠BAC

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

In which form is the following function written? y = - 2(x – 3)(x + 5)

Answer for 10 points show work you guys in advanced < 3