Cho hàm số Tìm m để y" ≥ 0 với mọi x ∈ R

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

Evaluate the expression. (9 + 5)(3 + 2)0

Joe had 25 pencils he divided them into 5 pieces how many pieces does he have left