I am having a party. I purchase: x pizzas, y 12-packs of soda, and zcupcakes for a party. If each pizza costs $7.50, each 12-pack of soda costs $3.25, and each cupcake cost $0.75, write an equation for the total cost, t, in terms of x, y and z.

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)