<PRE><B>Question 213390</B>
A poster is 15 inches longer than it is wide. Find a function that models its area A in terms of its width w.


Step 1.   Length L is w+15.


Step 2.   Area of Poster A is equal to length times width


{{{A=Lw=w(w+15)}}}


{{{A=w(w+15)=w^2+15w}}}  ANSWER


I hope the above steps were helpful.


For FREE Step-By-Step videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.


Good luck in your studies!


Respectfully,
Dr J</PRE>