For the right triangle below, find the length of x. Round to the hundredths. (2 decimal places)

Pls! does anybody know a shortcut for answering these types of questions in the future?

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?