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
B wpuld be your answer
Its the nearest ft from 70.
I think the answer would be 60.
Hopefully this helps ya out but I may be wrong so please don't get angry.
