What is 5 5/6 + 5 4/5 and show the work.

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

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