Answer:
1) The third option.
2) The last option.
Step-by-step explanation:
1) f(x) is greater on the interval (0,3), which is opened, because if you substitute
you obtain the following result:

2) If
, you obtain that:

Therefore: 
Answer:
The addition property of equality
Step-by-step explanation:
2 + 8 = 10
10 = 10