Answer:
Width = 3 inches
Length = 7 inches
Step-by-step explanation:
L = 1 + 2W
P = 20 inches
P = 2L + 2W
2L + 2W = 20 inches
Fill in known value (length)
2(1 + 2W) + 2W = 20 inches
Solve
2 + 4W + 2W = 20 inches
6W = 18 inches
Simplify
W = 3 inches
Length = 2(3) + 1 = 7 inches
:)
P = 2(L + W).....perimeter of a rectangle formula
P = 20
L = 2W + 1
20 = 2(2W + 1 + W)
20 = 2(3W + 1)
20 = 6W + 2
20 - 2 = 6W
18 = 6W
18/6 = W
3 = W <==== the width is 3 inches
L = 2(3) + 1
L = 6 + 1
L = 7 <===== the length is 7 inches
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