Question

Which inequality is true for all real numbers? Check all that apply.

1. a-b < a+b
2. ac ≥ bc
3. if a ≥ b, then a+c ≥ b+c
4. if c > d, then a-c < a-d
5. if a < b, then a < b+c

Answer 1

The answer is 1, i.e a-b < a+b

Answer 2

Its C: If a ≥ b, then a + c ≥ b + c

and D: If c > d, then a– c < a – d