The nth term of a different sequence is 2n² - 4

Find the 3rd term of this sequence.

2.5 milligrams is equivalent to how many grams

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)

Me i’m stuck on all these questions besides the two bottom ones