What is the vertex of the parabola y = 6x^2?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

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?