Final answer:
The integer (y) must be less than 0 for the inequality (5 + y) < (5 - y) to hold true. Adding y to both sides and then subtracting 5 from both sides of the inequality, we simplify it to 2y < 0, which means y < 0.
Step-by-step explanation:
The question asks for the nature of integer y when (5 + y) is less than (5 - y). To solve this, we set up the inequality:
5 + y < 5 - y
Adding y to both sides to get rid of y on the right side, we get:
5 + 2y < 5
Subtracting 5 from both sides to isolate the y term, we have:
2y < 0
Dividing both sides by 2 to solve for y, we obtain:
y < 0
This shows that (y) is an integer that is less than zero, which means the correct choice is (b) y < 0.