Calculate cos−1(−2√2) cos − 1 ⁡ ( − 2 2 ) cos−1(−2√2)= cos − 1 ⁡ ( − 2 2 )

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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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)