This elementary work for my high school class will y’all help me plz

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Ten times the square of a non-zero number is eqaul to ninety times the number

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?