What would I put for this one

Adding and subtracting matricesfind the value of each variable. x = and y = would

What is the square root of 45? (step by step working plz)

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