Do the lengths of 10, 20, 22, make a right, acute, or obtuse triangle?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

Tatiana wants to give friendship bracelets to her 32 classmates. she already has 5 bracelets, and she can buy more bracelets in packages of 4. write an inequality to determine the number of packages, p, tatiana could buy to have enough bracelets.