What is 4w − 7k = 28 for k ? i understand how to do the first parts of the equation but im getting confused at the end. explain it

Mary spent a total of $323.14 for a party. she spent a total of $200.22 on food, plus an additional $30.73 for each hour of the party. how long was the party?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

What are the solutions of the equation? 6x^2 + 11x + 4 = 0 a. 4/3, 1/2 b. -4/3, -1/2 c. 4/3, -1/2 d. -4/3, 1/2