Answer:
20p - 2
Step-by-step explanation:
To find a perimeter, you take the values of each side and add them together.
[tex](p-8)+(9p-7)+(p-8)+(9p-7)[/tex]
- Bring all values with a p to one side
[tex]p+9p+9p+p-8+7-8+7[/tex]
- Simplify, knowing values with an attached variable cannot be added to values without an attached variable.
[tex]20p-8+7-8+7[/tex]
- Simplify the other numbers.
[tex]20p-2[/tex]
