I need help please. Which of the following expressions are equivalent to 7x + 14 − 3x + 12?

1. 21x + 8x

2. 7x − 3x + 14 + 12

3. 4x + 14 + 12

4. 4x − 2

5. 7x + 26 − 3x

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}