Which expressions are perfect square trinomials? Select the three correct answers.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

The equation |pl = 2 represents the total number of points that can be earned or lost during one turn of a game. which best describes how many points can be earned or lost during one turn? o o -2 2 oor 2 -2 or 2 o

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?