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18. A garden lot has a dimension (2a + b) meters by (3a) meters. What is its perimeter?
A. (a + b) meters
C. (5a + 3ab) meters
B. (10a + 2b) meters
D. (6a? + 3ab) meters​

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Answer:

P = (2a + b)2 + (3a)2

P = 4a + 2b + 6a

P = 10a + 2b

B. (10a + 2b) meters

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Answer:

d

Step-by-step explanation:

(2a+b)(3a)

=6a+3ab

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