4/7 divided by 7/8 , explain your answer.. i'm having math trouble i need an answer fast

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?

Factor this polynomial completely. 12x^2+ x-6

If f(x) = 5х – 2 and g(x) = 2х + 1, find (f – g)(x).