Answer:
(x - 9)2 Step-by-step explanation:
Answer: 
Step-by-step explanation:
- Original equation:

- Subtract 5x from both sides of the equation:

- Divide both sides of the equation by -1:

- Divide both sides of the equation by 3 to get y on the left, leaving the equation in
form: 
- Evaluate. Slope is equal to m in this form, so the slope is
.
Hope this helps!
The 9th student is in the middle.
⇒ There are 8 students before him
⇒ There are 8 students behind him
Total number of students = 8 + 1 + 8 = 17
Answer: 17