Question:The length is 3 times the width. The length and width are both reduced by 2. The area of the rectangle is reduced by 36. This is exactly as appears in my book, any help would be greatly appreciated.
Answers:
Length= 3*width
Length=l
Width = w
(l-2)(w-2)=lw-36 (because lw is the area)
plug in 3w for l
(3w-2)(w-2)=3w^2-36
3w^2-8w+4=3w^2-36
-8w=-40
w=5
l=15
and to check plug back in
the area of the original is 5*15=75
The area of the adjusted is 3*13=39
75-39=36
PERFECT!!
PS... chase is an idiot!
3L=W
therefore because 3L + W= 36 and 3L= W, then its safe to say that 2W= 36.
Then one W=18
Then 3L=18 so 18 divided by 3.L=6
This means that the orig. because the new one is reduced by 2
Orig L=8
Orig W=20
Orig area= 160
Also L is length and W is width..sorry if confusion
This article contents is post by this website user, EduQnA.com doesn't promise its accuracy.
More Questions & Answers...
Am i doing this right so far?
Probability question! Please Help!?
When/ where are mathematical grads (trigonometry) used?
Subtract 8 from the sum of x and four times five and the result is 16?
I need a Lord of the Rings website for my class and he said the weirder the better...?
Does anyone know an event that was in a magazine or newspaper tha relates to the book THE CATCHER IN THE RYE?
How to find world famous libraries and search their catalogues in any subject?
I have to do a 10 minute presentation for an Interview- any tips?