Which expression is equivalent to 3cos^2(theta/2)-3

Find the roots of the equation below. x^2 - 6 + 9 = 0

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)

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x