Answers

  • Brainly User
2016-01-27T00:16:52+08:00
Width:      x
length:     x + 3
Perimeter = 76 

Equation:
P = 2(L) + 2(W)
76 = 2(x+3) + 2 (x)
76 = 2x + 6 + 2x
76 = 4x + 6
76 - 6 = 4x
70 = 4x
4x/4 = 70/4
x = 17 1/2  or 17.5 cm

Substitute 17.5 for x:
Width: x          ⇒  17.5 cm
Length: x + 3  ⇒   17.5 + 3 = 20.5 cm

ANSWER: The dimensions are:
                    Length = 20.5 cm
                    Width = 17.5  cm

Check:
2(20.5 cm) + 2(17.5 cm) = 76 cm
41 cm + 35 cm = 76 cm
76 cm = 76 cm    (True)


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