Answer:
P = 2x + 2y + 8
Explanation:
The perimeter (P) of a rectangle is calculated as
P = 2(l + w) ← l is length and w is width , then
P = 2(x + 5 + y - 1) ← distribute parenthesis
= 2x + 10 + 2y - 2 ← collect like terms
= 2x + 2y + 8
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