Answer:
14a-8
Explanation:
A perimeter is the sum of the length of each side. So we can find the perimeter by adding: (a+1)+(a+1)+(6a-5)+(6a-5).
Combine like terms to get: 14a+2-10 = 14a-8.
Without knowing what a is, the perimeter is 14a-8.
2(6a - 5) + 2(a + 1) =
= 12a - 10 + 2a + 2 =
= 12a + 2a - 10 + 2 = 14a - 8
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