Find the surface area and the volume of a cylinder with a radius of 9in and height of 20in plzzz show your work

The angles below are supplementary. what is the value of x? a pair of supplementary angles is shown. one angle measures 7x + 33, and the other angle measures 70. 5.3 8.14 11 14.7

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?