Which set of numbers are rational numbers but not integers, whole numbers, or natural numbers? PLEASE HURR

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

What is the equation of the line in point-slope form? y+ 4 = 1/2(x+4) y-4 = 1/2(x + 4) y-0 = 2(x - 4) y-4 = 2(8-0)

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a