Bobby delivered 9/10 of the mail . How much more mail does Bobby have to deliver

The capulet and montague families love writing. last year, each capulet wrote 444 essays, each montague wrote 666 essays, and both families wrote 100100100 essays in total. this year, each capulet wrote 888 essays, each montague wrote 121212 essays, and both families wrote 200200200 essays in total. how many capulets and montagues are there? choose 1

Find the total area for the regular pyramid ( follow the answer set up in the picture)

Solve for x, y, and z. show all steps.