The length of the rectangle is twice its width. write and solve a system of linear equations to find the length l and width w of the rectangle (perimeter=36)

1)  L = Length,  W = Width, perimeter = 36

then

2L+2W =36

L = 2W

of the equation 1 , find  W

2L+2W = 36⇒2L=36-2W⇒L= 36-2W/2⇒L= 18-W

Now substitute it value with the equation 2

18-W = 2W⇒18 =2W+W⇒18= 3W⇒W= 18/3 = 6, L = 18-6 = 12

NOW SUBSTITUTE THE VALUES IN THE EQUATION 1

2* 12+ 2*6 = 36 , IT IS FULFILLED

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step-by-step explanation:

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: