The answer is b because I know trust me =)
Answer:

Step-by-step explanation:
Given that t represents a number which is unknown to us, the difference of the number and 9 can be expressed algebraically as:
.
The difference of t and 9 =
.
Correct answer is
<span>7x + 4 – 5/x-1
</span>
The answer is x >_ -2 and x >_ 7.