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Pls help me with this question

Pls help me with this question-example-1
User Flory
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1 Answer

3 votes

Answer:

$1272

Explanation:

You want the total cost of crown molding for the perimeter of a hall measuring (6x +9) feet by (8x +7) feet, for a total length of 30x feet, at $2.65 per foot.

Perimeter

The perimeter of the hall is given by ...

P = 2(L +W)

For the given values, this is ...

30x = 2((6x +9) +(8x +7))

15x = 14x +16

x = 16

Cost

Then the cost of the molding is ...

(30x feet)·($2.65/foot) = (30)(16)($2.65) = $1272

The total cost of molding for the hall is $1272.

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Additional comment

In the attached, we found the value of 2(L+W)-P, which will be zero. The expression that resulted was -2x +32. Solving -2x +32 = 0 gives x = 16, as above.

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Pls help me with this question-example-1
User Galaxy IT
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