Answer:
The answer is D
Explanation:
Answer: D
(1st) A is given as a=s
2nd ) b=s+1
3rd) the perimeter will be written as : both sides + both widths
so 2(s+1) + 2(s-6)
expand it so it becomes 2 s + 2 +2 s -12
4th combine like terms = 4 s -10
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