Respuesta :
sometimes true, depends on d. ex: -8 + -8 is negative, but -8 + 9 is positive
Answer: His claim is SOMETIMES true.
Let's just take an example, d=2.
-8 + 2 equals -6, so negative. BUT, let's say d=9.
-8 + 9 equals 1, 1 is positive.
Jerry's claim is sometimes true.