Questions on Algebra: Unit Conversion answered by real tutors!

Algebra ->  Algebra  -> Conversion and Units of Measurement -> Questions on Algebra: Unit Conversion answered by real tutors!     (Log On)
Ad: Algebra Solved!™: algebra software that solves YOUR algebra homework problems with step-by-step help!

   

Question 139246: 1) A rectangular garden , with length three times its width, is to be expanded so that both sides are increased by 9 yards
A) f(x)= 4x + 18
B) f(x)= 3x^2 + 81
C) f(x)= 3x^2 + 36x + 81
D) f(x)= 3x^2 + 18x + 81: 1) A rectangular garden , with length three times its width, is to be expanded so that both sides are increased by 9 yards
A) f(x)= 4x + 18
B) f(x)= 3x^2 + 81
C) f(x)= 3x^2 + 36x + 81
D) f(x)= 3x^2 + 18x + 81
Answer by scott8148(2759) About Me  (Show Source):
You can put this solution on YOUR website!
if x=width, then C) is the area function

FOILing __ (x+9)(3x+9)=3x^2+27x+9x+81=3x^2+36x+81