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
6b<42
b<7
4b+12>8
4b>-4
b>-1
b>-1 or b<7
Answer:
a(n) = a(n-1) + 4
Step-by-step explanation:
a(1) = 2 The first term is 2
a(n) = a(n-1) + 4 We add 4 to the previous term or n-1
So, we get...
a(n) = a(n-1) + 4
a(1) = 2
a(2) = a(2-1) + 4 2(1) +4 = 6
a(3) = a(3-1) +4 3(2) + 4 = 10
and so on and so forth. I hope this helps.
