PLEASE HELP 30 POINTS TO WHOEVER HELPS I NEED IT QUICK PLEASE HELP

What is the quadric regression equation that fits these data

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)

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction