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Elina [12.6K]
3 years ago
13

A rectangular painting measures 15 inches by 18 inches and contains a frame of uniform width around the four edges. The perimete

r of the rectangle formed by the painting and its frame is 90 inches. Determine the width of the frame.

Mathematics
1 answer:
vfiekz [6]3 years ago
5 0

Answer:

3 inches

Step-by-step explanation:

Lenght = 18 inches

Width =15 inches

Perimeter of the rectangular painting and frame = 90 inches

Let X be the width of the frame

The width of the framed picture = 15 + 2x

The length of the framed picture = 18 + 2x

Perimeter = 2 (L + W)

90 = 2(15 + 2x + 18+ 2x)

90 = 2(33 + 4x)

90 = 66 + 8x

8x = 90 - 66

8x = 24

x = 24/8

x = 3 inches

the width of the frame is 3 inches

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