Expand 4x(7x-11)expand 3x(7-5x)can someone me with tge questions above?

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15