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17 March, 20:45

A watercolor painting is 15inches long by 9 inches wide. Ramon makes a border around the watercolor painting by making a mat that adds 3 inches to each side of length and width. What is the area of the mat?

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  1. 17 March, 21:00
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    81 in

    Step-by-step explanation:

    The watercolor painting area:

    width x length = the formula for the area of a rectangle.

    9 x 15 = 135

    The mat area:

    15 + 3 = 18

    9 + 3 = 12

    12 x 18 = 216

    216 - 135 = 81
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