PICTURE BELOW PLEASE EXPLAIN Is this a function?

A) Yes
B) No

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?