Here is how i solved it hope it helps
Answer:
Step-by-step explanation:
When you distribute a positive sign to a parentheses, you essentially change nothing. So, you can drop all of the parentheses for this entire equation. Now combine like terms.

or

Do a squared plus b squared equals c squared
#7:
It means to solve for y.
#8:
We can write:
l = w + 2
Because it says the length is 2 more than the width.
The answer is A i am pretty sure i would need to check it tho