IDNStudy.com, kung saan ang iyong mga tanong ay natutugunan ng mga maaasahang sagot. Makakuha ng mga kumpletong sagot sa lahat ng iyong mga tanong mula sa aming network ng mga eksperto.
Sagot :
l = 12
w = 7
l × w =area
12×7= 84
2l + 2w = perimeter
24 + 14 = 38
chineck ko na po pra sa inyo!
w = 7
l × w =area
12×7= 84
2l + 2w = perimeter
24 + 14 = 38
chineck ko na po pra sa inyo!
area of a rectangle is defined by the formula
A = l x w
and perimeter by the formula
P = 2l + 2w
-------------
given that area is 84
and perimeter is 38, you can substitute it to both equations stated above
----------
you'll have
A = l x w
84 = l x w ----equation 1
P = 2l + 2w
38 = 2l + 2w ----equation 2
------------
divide equation2 by 2
(38 = 2l + 2w) ÷ 2
19 = l + w
l = 19 - w -----equation 3
------------
substitute equation 3 to equation 1
84 = l (w)
84 = (19-w)(w)
84 = 19w -w^2
transpose 19w - w^2 to the left side of the equation
w^2 - 19w + 84 = 0
factor
(w-12)(w-7) = 0
w-12=0
w=12
w-7=0
w=7
--------
if w=12
substitute to equation 3
l = 19 - w
l = 19 - 12
l = 7
-----------
if w=7
l = 19-w
l = 19-7
l = 12
----------
but common knowledge will tell you that length must be of greater value than the width.
then you can say that
l = 12
w = 7
A = l x w
and perimeter by the formula
P = 2l + 2w
-------------
given that area is 84
and perimeter is 38, you can substitute it to both equations stated above
----------
you'll have
A = l x w
84 = l x w ----equation 1
P = 2l + 2w
38 = 2l + 2w ----equation 2
------------
divide equation2 by 2
(38 = 2l + 2w) ÷ 2
19 = l + w
l = 19 - w -----equation 3
------------
substitute equation 3 to equation 1
84 = l (w)
84 = (19-w)(w)
84 = 19w -w^2
transpose 19w - w^2 to the left side of the equation
w^2 - 19w + 84 = 0
factor
(w-12)(w-7) = 0
w-12=0
w=12
w-7=0
w=7
--------
if w=12
substitute to equation 3
l = 19 - w
l = 19 - 12
l = 7
-----------
if w=7
l = 19-w
l = 19-7
l = 12
----------
but common knowledge will tell you that length must be of greater value than the width.
then you can say that
l = 12
w = 7
Ang iyong kontribusyon ay napakahalaga sa amin. Patuloy na magbahagi ng impormasyon at kasagutan. Sama-sama tayong magtutulungan upang makamit ang mas mataas na antas ng karunungan. Para sa mabilis at eksaktong mga solusyon, isipin ang IDNStudy.com. Salamat sa iyong pagbisita at sa muling pagkikita.