SOLUTION: Hi, I need to find the expression that represents this rectangle? The sides are 4x-4 and 8x+10. Can anyone help me? Thank you very much. tracy

Algebra ->  Algebra  -> Surface-area -> SOLUTION: Hi, I need to find the expression that represents this rectangle? The sides are 4x-4 and 8x+10. Can anyone help me? Thank you very much. tracy      Log On

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Question 113139: Hi, I need to find the expression that represents this rectangle?
The sides are 4x-4 and 8x+10.
Can anyone help me?
Thank you very much.
tracy
Answer by ankor@dixie-net.com(12694) About Me  (Show Source):
You can put this solution on YOUR website!
The sides are 4x-4 and 8x+10.
:
There are two ways to express a rectangle. Perimeter or Area. You did not specify
Let W = 4x-4
and
L = 8x + 10
:
Area:
A = L * W
A = (4x - 4) * (3x + 10)
FOIL
A = 12x^2 + 40x - 12x - 40
A = 12x^2 + 28x - 40
:
The perimeter:
P = 2L + 2W
P = 2(8x+10) + 2(4x-4)
Multiply what's inside the brackets
P = 16x + 20 + 8x - 8
P = 24x + 12