Which description represents the absolute value of-5? I have tired and I do not think I got it right .help pls?

Ill mark the brainliest if you me with the these three questions 7,8,9

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)

Find the domain and range of the following function f(x) = 51x - 21+ 4