What is 5*4 is 20 so if you add 1 what would it be?

What is the prime factorization of 23 ?me with this question

What is the domain of the given function? {(3,-2), (6, 1), (-1, 4), (5,9), (-4, 0); o {x | x= -4,-1, 3, 5, 6} o {yl y = -2,0, 1,4,9} o {x|x = -4,-2, -1,0, 1, 3, 4, 5, 6, 9} o y y = 4,-2, -1, 0, 1, 3, 4, 5, 6, 9}

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)