What is 9/3 as a mixed fraction

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Calculate ∬y da where r is the region between the disks x^2+y^2 < =1 & x^2+(y-1)^2 < =1 show all work. (also explain why you split up the regions)