Ruby is purchasing fencing to go around a rectangular lot which is 4x + 9 feet long and 3x - 5 feet wide. Which expression represents the amount of fencing she must buy?

Correct answer:

o = ft 14x+8

Step-by-step explanation:

a = 4x+9  ft b = 3x5  ft  o = 2a+2b o = 2(4x+9) + 2(3x5) o = 8x+18 + 6x10 o=14x+8

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