Answer:
Perimeter = 20ft
P = 2L + 2W
20 = 2L + 2W
20/2 = 2L/2 + 2W/2
10 = L + W
10 - W = L
10 - L = W
Area = 21 ft²
A = LW
21 = (10-w)w
21 = 10w - w²
w² - 10w + 21 = 0
(w-7)(w-3) = 0
w -7 = 0
w = 7
w -3 = 0
w = 3
L = 10 - W
L = 10 - 7
L = 3
3ft by 7ft
W = 10 - L
W = 10 - 3
W = 7
7ft by 3ft
Dimension - Length and width
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Answer:
Perimeter = 20ft
P = 2L + 2W
20 = 2L + 2W
20/2 = 2L/2 + 2W/2
10 = L + W
10 - W = L
10 - L = W
Area = 21 ft²
A = LW
21 = (10-w)w
21 = 10w - w²
w² - 10w + 21 = 0
(w-7)(w-3) = 0
w -7 = 0
w = 7
w -3 = 0
w = 3
L = 10 - W
L = 10 - 7
L = 3
3ft by 7ft
W = 10 - L
W = 10 - 3
W = 7
7ft by 3ft
Dimension - Length and width