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klemol [59]
3 years ago
14

A gardener has a rose garden that measures 30 feet by 20 feet. He wants to put a uniform border of pine bark around the outside

of the garden. Let x be the width of the border in feet. Write an expression for the total area of the border in terms of the width x.
Mathematics
1 answer:
babunello [35]3 years ago
7 0

Answer:

4x² +100x

Step-by-step explanation:

The total area of the garden plus the pine bark border is given by:

A = (30+2x)*(20+2x) = 600+60x +40x +4x^2

The area of the garden alone, without the border, is:

A_G = 30*20=600

Subtracting the total area by the area of the garden gives us the area of the border:

A_B = A -A_G\\A_B= 600+100x+4x^2 - 600\\A_B = 4x^2 +100x

The total area of the border is described by 4x² +100x.

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