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Manuel2019
02.12.2019 •
Mathematics
In a given rectangle, the shorter side is 3 units less than the longer side. if we let the longer side be represented by the variable x, create an expression that represents the perimeter of the rectangle. (p=2l+2w)
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Ответ:
P = 4x - 6
Step-by-step explanation:
In a given rectangle, the shorter side is 3 less than the longer side.
Let the longer side is the length of the rectangle L and the shorter side of the rectangle is the width of the rectangle W.
Then from the condition given we can write that L = W + 3 (1)
Now, perimeter of the rectangle is given by P = 2(L + W)
So, from equation (1) we can write P = 2(L + L - 3) {Since W = L - 3}
⇒ P = 2(2L - 3) = 4L - 6.
Now, if we represent L as the variable x, then the expression for perimeter P = 4x - 6 (Answer)
Ответ:
x + y = 9
y = -x + 9
x + 3 = y
y = x + 3