Answer:
I'll answer one question
Step-by-step explanation:
a. x >= -4. This reads, the domain is greater than and equal to negative four to infinity.
Answer:
3x + 30
Step-by-step explanation:

3x + 30 would be an equivalent expression.
Hope this helps.
Answer:
its very simple you just need to collect like terms...
which is 4x-6x+6+9 which is
-2x+15.
This is my answer I hope it helps you.