Can someone me with the ones that are circled?

you so much greatly appreciated : )

Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.

What is value of x? enter your answer in the box. x =

Which concept can be used to prove that the diagonals of a parallelogram bisect each other?