Find an for the arithmetic series with S16=-288 and a1=-21

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount