If the volume of a cylinder is 863.cm3 and the height is 11cm, the radius will be what

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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)