How is domain of the function f(x)=cos x restricted so that its inverse function exists?

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Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

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)

What is mean median mode and range?