The length of a rectangle is 3 square x2 +5%-1 and its width is 3x + 1. Find its perimeter.
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Answer:
5x + 5
6x2 + 10x
5x + 10
6x2 + 5
10(x + 1)
Correct answer:
10(x + 1)
Step-by-step explanation:
ven that w = 2x and l = 1.5w + 5, a substitution will show that l = 1.5(2x) + 5 = 3x + 5.
P = 2w + 2l = 2(2x) + 2(3x + 5) = 4x + 6x + 10 = 10x + 10 = 10(x + 1)
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