09-05-2018
Mathematics

contestada

A notebook has a perimeter of 36 inches. It’s area is 80 square inches. What are the dimensions of the notebook

inches by_ inches

Respuesta :

jinc0930 jinc0930

09-05-2018

Let's call he width of the notebook w and the length l

w*l=80

2(w+l)=36
w+l=18
w=18-l

(18-l)*l=80
-l^2+18*l-80=0
l=8 or 10

Therefore, the notebook is 8 by 10 inches

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