Question

Please help i would greatly appreciate it :D

Answer 1

8.

`40+105+x=180\\ x=35`

9.
The sum of two sides must be greater than the third side.
It can't be 5 because
`5+5=10\\ot>12`.
It can't be 7 because
`5+7=12\\ot>12`.
It can't be 17 because
`5+12=17\\ot>17`.
So it's 12.

10.
a. Turk, McAllister
b. Market, Mission, Howard
c. not sure about this one