Answer:
9a+12
Step-by-step explanation:
The perimeter is the sum of the side lengths, so is ...
6a + a + 4 + 8 + 2a
= a(6 +1 +2) + (4 +8)
= 9a +12
13.0
sin(65°) × 14.3 would give u 12.9 then u round it to the 13
x=5
for the work I use a website called symbolab.com and it does all the work and everything for you!
