(x+7)(x+3) polynomial standard form

Adriano loves anime and collects toys from his favorite series. each month he gains 4 toys. if adriano has 3 toys when he starts collecting, how many does he have after 4 months

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .