Lisa ate 1/3 of pizza. kate ate 4/12 of same pizza. what fraction did they eat altogether

Ineed with number 17 i don’t get it at alll

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)