What is the ordered pair location of the greatest y-intercept of the three functions?

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?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

What is the value of the discrimination for the quadratic equation 0=×2+2+×2